Still COVIDing Canada Posts

The CSA’s revised standard on respirators should help us all breathe easier

With an absent CDC and mismatched ‘subclade K’ flu strain, experts face upcoming season with uncertainty

Published November 12, 2025

Published by: CIDRAP
Published on: November 12, 2025
By Stephanie Soucheray

Earlier this month, a group of Canadian researchers published early influenza data for the 2025-26 season, issuing a warning: There has been an observed mismatch with the seasonal influenza vaccine strain and what is emerging as the dominant flu strain this season, H3N2 subclade K.

Based on early reports from Japan and the United Kingdom, the Canadian researchers wanted to publish these data to encourage enhanced surveillance in North America this season, especially given the tumultuous situation in the United States.

“This is not the time to be flying blind into the respiratory virus season,” Danuta Skowronski, MD, the epidemiology lead for influenza and emerging respiratory pathogens at the British Columbia Centre for Disease Control, told CIDRAP News. Skowronski was senior author of the paper, which was published in the Journal of the Association of Medical Microbiology and Infectious Disease Canada.

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Photo of a doctor (right) who is examining a patient (left). The doctor is wearing a white respirator, and she has long dark hair.

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universal masking

The CSA’s revised standard on respirators should help us all breathe easier

Published November 10, 2025

Published by: The Conversation
Published on: November 3, 2025
By Dick Zoutman, Julia M. Wright, Mark Ungrin, Ryan Tennant

The CSA Group — a not-for-profit standards organization — released for review a new draft standard on the “Selection, Use, and Care of Respirators” (CSA Z94.4:25) for workplaces, specifically including health care. This new standard is designed to ensure much better protection for health-care workers and for everyone seeking health care.

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measles

Canada officially loses its measles elimination status

Published November 10, 2025

Published by: The Globe and Mail
Published on: November 10, 2025
By Alanna Smith, Kristy Kirkup

Canada has been stripped of its measles elimination status after failing to interrupt transmission within one year of an outbreak that continues to spread in parts of the country.

The Public Health Agency of Canada said Monday it was notified by The Pan American Health Organization, a regional arm of the World Health Organization, that Canada lost its designation – an accomplishment it held for 27 years.

“While transmission has slowed recently, the outbreak has persisted for over 12 months, primarily within under-vaccinated communities,” the statement said.

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Risk of rare heart complications in children higher after COVID-19 infection than after vaccination

Published November 4, 2025

Published by: University of Cambridge
Published on: November 4, 2025

Children and young people faced long-lasting and higher risks of rare heart and inflammatory complications after COVID-19 infection, compared to before or without an infection, according to new research. Meanwhile COVID-19 vaccination was only linked to a short-term higher risk of myocarditis and pericarditis.

The study is the largest of its kind in this population, and is published today in The Lancet Child and Adolescent Health. It was led by scientists at the Universities of Cambridge and Edinburgh, and University College London, with support from the British Heart Foundation (BHF) Data Science Centre at Health Data Research UK.

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Ontario School Safety Calls on Province for an Immediate Vaccine-PLUS Strategy to Tackle Current Measles Outbreak

What we must confront: Living with Long COVID

Published November 3, 2025

Published by: The Peak
Published on: November 3, 2025
By Ashima Shukla

The first winter of the pandemic, I was in Shanghai visiting my family when the first news reports began circulating — something about a new pneumonia, a city in lockdown. Within days, my family and I had boarded a flight to India, seeking temporary refuge. Three days before our flight back, India closed its borders. Airports emptied. Around the world, our lives shrank to the size of our homes. For millions around the world, it meant grieving in isolation, watching suffering multiply. It meant exposure to the deep inequities of our world, where access to safety, care, and health depended on privilege, geography, and luck.

Over time, things seemed to return to normal. However, the virus, though silenced, persisted, reshaping bodies and altering lives long after the headlines moved elsewhere.

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cardiovascular disease

Covid and Flu Can Triple Your Risk of Heart Attack

Published October 29, 2025

Published by: The New York Times
Published on: October 29, 2025
By Nina Agrawal

The risk of a heart attack triples within the first few weeks after a Covid-19 infection, the study suggested, and quadruples in the month after a flu infection. The study, published Wednesday in the Journal of the American Heart Association, was a large review and analysis of existing research.

“It endorses a general idea that we’ve been thinking about and talking about for the past several years — that infections are generally not benign,” said Dr. Ziyad Al-Aly, a senior clinical epidemiologist at Washington University in St. Louis, who was not involved in the study.

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research

A surprise bonus from COVID-19 vaccines: bolstering cancer treatment

Published October 20, 2025

Published by: Science
Published on: October 20, 2025
By Phie Jacobs

The innovative messenger RNA (mRNA) vaccines that thwarted the ravages of COVID-19 may also help fight tumors in cancer patients, according to a new analysis of medical records and studies in mice.

People with cancer who coincidentally received the mRNA shots before starting drugs designed to unleash the immune system against tumors lived significantly longer than those who didn’t get vaccinated, a research team announced yesterday at the European Society for Medical Oncology Congress in Berlin. Laboratory experiments by the group suggest the vaccines rev up the immune system, making even stubborn tumors more susceptible to treatment.

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PEI

P.E.I. hospitals bring back mask mandates as experts warn of viral surge across Canada

Published October 16, 2025

Published by: CTV News
Published on: October 16, 2025
By Maria Sarrouh

Mandatory masking is back at health facilities across Prince Edward Island as public health officials work to reduce the spread of respiratory illnesses.

The newest numbers from Canada’s respiratory virus surveillance report show that during the week ending Oct. 4, COVID-19 activity was increasing on the Island, with about 20 per cent of tests coming back positive. Nationally, the average was under 10 per cent.

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Colourized transmission electron micrograph of a measles virus particle (red), with a blue background. Photo: CDC and NIAID. Licensed under Creative Commons CC BY 2.0 DEED Attribution 2.0 Generic license. https://creativecommons.org/licenses/by/2.0/

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Ontario

Ontario School Safety Calls on Province for an Immediate Vaccine-PLUS Strategy to Tackle Current Measles Outbreak

Published April 24, 2025

Published by: Ontario School Safety
Published on: April 24, 2025

Toronto, Ontario – [April 24, 2025] – In an urgent appeal to protect the health and safety of Ontario’s students, education workers, and families, Ontario School Safety (OSS) has issued an open letter asking the Ontario Provincial Government and Public Health Ontario for an immediate vaccine-PLUS strategy, which includes the essential role of healthy indoor air, to curtail the spread of measles. This critical request comes in the wake of concerning measles infection rates – as of April 17th, 2025, Public Health Ontario is reporting 925 measles cases in the province, more than five times the number of cases than the total number of cases over the last 12 years. Encouraging a vaccine-only strategy is insufficient due to barriers to access, and because measles spreads not only through direct contact with secretions or contaminated surfaces, but through the air we breathe.

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Volunteers needed to test no-needle COVID vaccine made in Hamilton

Photo of the Michael G. DeGroote School of Medicine at McMaster University in Hamilton, Ontario. The building features a glass-walled atrium. In the foreground, there are some trees with green leaves. Photo by Captain108 / Wikimedia Commons.

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Federal cuts threaten to close Pennsylvania lab that certifies N95s and other respirators in June

Volunteers needed to test no-needle COVID vaccine made in Hamilton

Published April 21, 2025

Published by: Hamilton Spectator
Published on: April 21, 2025
By Joanna Frketich

A made-in-Hamilton COVID vaccine that requires no needles is moving to the next stage of testing and researchers are looking for volunteers to take part.

The vaccine that is inhaled instead of injected will be studied by McMaster University researchers with $8 million in funding from the Canadian Institutes of Health Research (CIHR).

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Illustration of a white N95 respirator torn into two pieces, with violet background. Based on image by Rossie C S from Pixabay.

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N95 respirators

Federal cuts threaten to close Pennsylvania lab that certifies N95s and other respirators in June

Published April 17, 2025

Published by: Pennsylvania Capital-Star
Published on: April 17, 2025
By Ian Karbal

The Pennsylvania laboratory that certifies all of the country’s NIOSH-approved respirators is on the chopping block. HHS is stonewalling employees who raise questions.

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BC patients, health advocates slam removal of healthcare mask protections

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I traded my U.S. medical career for life in Canada. Here’s how the two health systems stack up.

BC patients, health advocates slam removal of healthcare mask protections

Published March 31, 2025

Published by: DoNoHarm BC
Published on: March 31, 2025

FOR IMMEDIATE RELEASE

DoNoHarm BC, Protect Our Province BC and the Canadian Covid Society warn the province’s decision endangers patients, healthcare workers, and the healthcare system

March 31, 2025 (British Columbia) – BC patients and health advocates are speaking out against the provincial government’s decision to drop healthcare mask requirements, at a time when there are multiple illness outbreaks in medical settings. Public health groups DoNoHarm BC, Protect Our Province BC, and the Canadian Covid Society warn that the move endangers vulnerable patients and frontline workers, while harming the sustainability and cost-effectiveness of BC’s healthcare system.

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A red emergency sign at a hospital. Photo: Pixabey.

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healthcare

I traded my U.S. medical career for life in Canada. Here’s how the two health systems stack up.

Published March 25, 2025

Published by: Canada Healthwatch
Published on: March 25, 2025
By Code Black

After more than a decade practicing emergency medicine in the United States, I very recently began working shifts in Canada. The differences hit me immediately, and are profound.

What follows are a series of working hypotheses — early impressions shaped by firsthand experience and years of health policy work in the U.S. I expect they will evolve with time, but they already point to important contrasts in how both countries approach medicine, physician autonomy, and the doctor-patient relationship.

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Smartwatch Data: Study Finds Early Health Differences in Long COVID Patients

A man with glasses, black shorts, and a grey long-sleeved top looks at his smartwatch as he runs alone on a road at sunset. In the background: green fields and trees. Photo: Benoît Deschasaux / Unsplash.

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BC’s Measles Vaccination Rate Is Lower Than in Gaines County, Texas

Smartwatch Data: Study Finds Early Health Differences in Long COVID Patients

Published March 20, 2025

Published by: Complexity Science Hub
Published on: March 20, 2025

People who later experienced persistent shortness of breath or fatigue after a COVID infection were already taking significantly fewer steps per day and had a higher resting heart rate before contracting the virus, according to a CSH study published in npj Digital Medicine. This may indicate lower fitness levels or pre-existing conditions as potential risk factors

Between April 2020 and December 2022, over 535,000 people in Germany downloaded and activated the Corona Data Donation App (CDA). Of these, more than 120,000 voluntarily shared daily data from their smartwatches and fitness trackers with researchers, providing insights into vital functions such as resting heart rate and step count.

“These high-resolution data served as the starting point for our study,” explains CSH researcher Katharina Ledebur. “We were able to compare vital signs in 15-minute intervals before, during, and after a SARS-CoV-2 infection.”

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Colourized transmission electron micrograph of a measles virus particle (red), with a yellow background. Photo: CDC and NIAID. Licensed under Creative Commons CC BY 2.0 DEED Attribution 2.0 Generic license. https://creativecommons.org/licenses/by/2.0/

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International Long COVID Awareness Day 2025

BC’s Measles Vaccination Rate Is Lower Than in Gaines County, Texas

Published March 14, 2025

Published by: The Tyee
Published on: March 14, 2025
By Michelle Gamage

In Gaines County, Texas, where a measles outbreak has killed one six-year-old and one adult, the measles vaccination rate among kindergarteners is just 82 per cent, according to reporting by The Atlantic.

That’s a higher measles vaccination rate than children have here in B.C.

Just under 82 per cent of two-year-olds have gotten one dose of the measles, mumps and rubella, or MMR, vaccine, and around 72 per cent of seven-year-olds have gotten both doses, according to the B.C. Childhood Immunization Coverage Dashboard’s 2023 data, which is the most recent data year available.

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Image of Ottawa sign with teal-coloured letters, with text in white reading: International Long COVID Awareness Day. Teal, grey and black symbol of International Long COVID Awareness Day.

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Ottawa-Gatineau

International Long COVID Awareness Day 2025

Published March 12, 2025

International Long COVID Awareness Day – COVID-cautious walk

Date: Saturday, March 15, 2025

Time: 7 pm – 8 pm

Where: Ottawa City Hall (meet at the entrance, Laurier Avenue side)

Join us for a walk on International Long COVID Awareness Day, Saturday, March 15, 2025 at 7 pm. The route is wheelchair-accessible.

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Advocates Urge BC to Reinstate Healthcare Mask Protections Amid Rising Risks

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Everything Wrong with Canada’s Proposed Long COVID Recommendations

Advocates Urge BC to Reinstate Healthcare Mask Protections Amid Rising Risks

Published December 10, 2024

Published by: DoNoHarm BC
Published on: December 10, 2024

DoNoHarm BC, Protect Our Province BC and the Canadian Covid Society warn of infection risks in healthcare

December 10, 2024 (British Columbia, Canada) – Advocacy groups in BC are calling on policy-makers to immediately reinstate healthcare mask requirements. The call comes as BC faces severe risks from COVID-19, a rise in “walking pneumonia,” local measles warnings, and Canada’s first human case of H5N1 avian influenza – which health officials warn could potentially turn into another pandemic.

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Photo of a doctor. She is wearing an obsolete blue medical mask, a blue cap and a white gown. Photo: Bermix Studio / Unsplash.

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Novavax now! We need access to the Novavax COVID-19 vaccine!

Everything Wrong with Canada’s Proposed Long COVID Recommendations

Published November 25, 2024

Published by: Canadian Health Sentinel
Published on: November 25, 2024
By Simon Spichak

Researchers involved in the organizations Cochrane Canada and the McMaster GRADE Centre at McMaster University are developing guidelines to prevent and treat Long COVID in Canada. Their effort is supported by the Public Health Agency of Canada and their recommendations would likely have major sway in the way Long COVID is treated if adopted.

Every month, they release new recommendations and provide an opportunity for public comment. On November 20th, the group released a new set of Canadian Post-COVID Condition (CAN-PCC) recommendations which propose harmful and ineffective treatments: Exercise to prevent Long COVID and cognitive behavioral therapy (CBT) to treat post-exertional malaise (PEM).

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Photo of two vials of a vaccine and a syringe, accompanied by white and gold text on a blue background reading: Novavax now! We need access to the Novavax COVID-19 vaccine. StillCoviding.ca #NovavaxNow Photo: oasisamuel / Adobe.

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Novavax now! We need access to the Novavax COVID-19 vaccine!

Published August 25, 2024

📣 Let PHAC and health ministers know you want timely access to the Novavax COVID-19 vaccine this fall

✉️ Send letters to PHAC and health ministers to voice your support for access to the Novavax COVID-19 vaccine this fall. Use our online tool to send emails.

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Local groups join forces for Vancouver’s second annual Clean Air Festival

Light blue illustrated image with clouds. Text reads, the second annual Clean Air Festival! (The “R” in Air has cartoon eyes and is wearing a mask). A Covid-safer hybrid event.

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The Risks of Killing a COVID Early Warning System

Local groups join forces for Vancouver’s second annual Clean Air Festival

Published August 22, 2024

Published by: Clean Air Festival
Published on: August 22, 2024

Event spotlights clean air, community care, and award-winning talent

August 22, 2024 (Vancouver, BC) – On September 15, 2024, a coalition of community groups will present Vancouver’s second annual Clean Air Festival. From 1-6:30 pm, Clean Air 604, Clean Air in BC Schools, DoNoHarm BC, Masks 4 East Van, Millions Missing BC, Protect Our Province BC, SolidAIRity GVRD, Safe Schools Coalition BC, Spring Vancouver, and Vancouver Still Cares will join forces to present a COVID-safer, immuno-inclusive hybrid event, taking place in-person at Slocan Park and digitally via livestream and recording.

The event features a DIY air purifier-building workshop, tabling, children’s games and activities from 1:00 pm, with a stage magic performance at 3:45 pm and an outdoor concert from 4:30 pm. Masks, rapid tests, zines and DIY fit test kits will be available while supplies last. Air purifiers from the workshop will be donated to schools via Clean Air in BC Schools, and to vulnerable community members via Masks 4 East Van.

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Photo of a person wearing an elastomeric respirator, with an outstretched, gloved hand reaching forward towards the viewer. On the light blue glove, the text reads: Stop COVID-19. With a bokeh effect, there is a sharp image of the glove, and the person’s face and respirator are blurred in the background. Photo: fernando zhiminaicela via Pixabay.

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Ontario

The Risks of Killing a COVID Early Warning System

Published August 1, 2024

Published by: The Tyee
Published on: August 1, 2024
By Andrew Nikiforuk

COVID-19 is surging in parts of North America and Europe, and even played a role in ending the presidential campaign of 81-year-old Joe Biden, who was infected for the third time last month.

Nevertheless, on Wednesday the Ontario government shut down its early warning system to detect COVID and other emerging diseases.

Doctors, citizens and researchers are calling the decision to kill the province’s wastewater disease surveillance program both wrong-headed and dangerous. Ending the program will make it harder to track and thwart viral outbreaks, they say, and thereby increase the burden on Ontario’s understaffed hospitals, which experienced more than 1,000 emergency room closures last year.

“Pandemics do not end because science has been muzzled,” Dr. Iris Gorfinkel, a well-known Toronto physician and clinical researcher, told the CBC.

In emails to politicians, more than 5,000 citizens have demanded restoration of the program, with little effect.

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Ontario: Protect our health — save Ontario’s wastewater monitoring!

Photo of some test tubes and equipment in a lab, with text: Protect our health. Save Ontario’s wastewater monitoring. StillCoviding.ca.

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take action

Ontario: Protect our health — save Ontario’s wastewater monitoring!

Published June 4, 2024

📣 Let MPPs know you want funding for Ontario’s wastewater monitoring program to continue

✉️ Send letters to MPPs to voice your support for wastewater monitoring. Use our online tool to send emails.

Why take action? Wastewater monitoring is an essential public health tool that provides insights into the spread of SARS-CoV-2 and other viruses in Ontario’s communities.

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Ontario: Call Members of Provincial Parliament on #WastewaterWednesday!

Photo of the Ontario Legislative Building, and the surrounding green lawn and trees. It is a sunny day, and the sky is blue with some clouds. Text reads: Save Ontario’s wastewater monitoring! Call Premier Ford Phone: 416-325-1941 TTY/Teletypewriter: 1-800-387-5559 StillCOVIDing.ca #WastewaterWednesday

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take action

Ontario: Call Members of Provincial Parliament on #WastewaterWednesday!

Published June 4, 2024

📣 Take action! Let MPPs know you want funding for Ontario’s wastewater monitoring program to continue

📱 Call MPPs to voice your support for wastewater monitoring.

✉️ Use our online tool to send letters to MPPs.

✉️ Use our online tool to send emails to municipal councillors in Ottawa or Waterloo Region.

📸 Post photos on social media.

Why take action? Wastewater monitoring is an essential public health tool that provides insights into the spread of SARS-CoV-2 and other viruses in Ontario’s communities.

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COVID virus can infect your eyes and damage vision

Illustration of an eye with a SARS-CoV-2 virus particle; with blue, black and coral pink colours. Illustration by Monika Jurczyk / Adobe.

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vision loss

COVID virus can infect your eyes and damage vision

Published May 15, 2024

Published by: Futurity
Published on: May 15, 2024
By Rochita Ghosh / University of Missouri

The virus that causes COVID-19 can breach the protective blood-retinal barrier, leading to potential long-term consequences in the eye, new research shows.

The blood-retinal barrier is designed to protect our vision from infections by preventing microbial pathogens from reaching the retina where they could trigger an inflammatory response with potential vision loss.

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BC health advocates call on government to reinstate healthcare mask requirements

A white N95 mask with yellow head straps against an orange gradient background. White text reads, Vulnerability isn’t seasonal. #KeepMasksInHealthcare. Let’s get loud! www.DoNoHarmBC.ca

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Study: Infection-control measures stemmed COVID spread in hospitals from 2020 to 2022

BC health advocates call on government to reinstate healthcare mask requirements

Published April 25, 2024

Published by: DoNoHarm BC
Published on: April 17, 2024

Protect Our Province BC, DoNoHarm BC, and Masks4EastVan highlight harms and human rights violations from loss of healthcare safety

Wednesday, April 17, 2024 (British Columbia) – Independent public health groups Protect Our Province BC, DoNoHarm BC, and Masks4EastVan are calling on the BC government to restore healthcare mask requirements. They are urging British Columbians to call for airborne pathogen protections in clinical settings by joining DoNoHarm BC’s campaign.

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Lieutenant (junior grade) Kayla Marthy, from Long Island, New York (left), and Lieutenant (junior grade) Brianna Garcia, from St. Petersburg, Florida, treat a patient in the intensive care unit aboard the hospital ship USNS Mercy (T-AH 19), on April 13, 2020. U.S. Navy photo by Mass Communication Specialist 2nd Class Ryan M. Breeden.

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N95 respirators

Study: Infection-control measures stemmed COVID spread in hospitals from 2020 to 2022

Published January 17, 2024

Published by: CIDRAP
Published on: January 17, 2024
By Mary Van Beusekom

Implementation of ventilation standards of at least five clean-air changes per hour, COVID-19 testing, the use of personal protective equipment (PPE), and universal wearing of respirators prevented most SARS-CoV-2 transmissions in a California healthcare system from 2020 to 2022, suggests a study published yesterday in Clinical Infectious Diseases.

For the study, University of California (UC) researchers used electronic health records and movement data of patients and staff to conduct viral genomic and social network analyses to estimate COVID-19 spread in the UC–San Diego Health system. The team analyzed 12,933 viral genomes from 35,666 infected patients and healthcare workers (HCWs) (out of 1,303,622 tests [2.7%]) from November 2020 to January 2022.

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“They’re Taking Away Your Right To Be Healthy.”

Image of a plague doctor wearing a plague mask and black clothes. The setting appears to be a smoky, dimly-lit room, with a bright light near the centre. Art by нυвιѕ тανєяη on Unsplash.

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activism

“They’re Taking Away Your Right To Be Healthy.”

Published January 12, 2024

Published by: OK Doomer
Published on: January 12, 2024
By Jessica Wildfire

The tide is turning. Thanks to all the people making noise on social media and bugging their families, while continuing to wear masks and build air purifiers no matter what anyone says, there’s a trace of hope.

—Jessica Wildfire

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Can You Catch Covid Outside? Yes, You Can.

Monochromatic image with a masked plague doctor in the foreground and a smoky background. Image generated using AI by Olivia. Source: Adobe stock image.

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outdoor transmission

Can You Catch Covid Outside? Yes, You Can.

Published November 28, 2023

Published by: OK Doomer
Published on: November 28, 2023
By Jessica Wildfire

You wouldn’t attend an outdoor party where measles or smallpox was present. Covid is no different, especially now.

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First-person stories from British Columbians

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First-person stories from British Columbians

Published August 28, 2023

Published by: DoNoHarm BC
Published on: August 28, 2023

CW: cancer, surgery, medical negligence, denial of care, disability grief

As part of DoNoHarm BC’s #Postcards4PublicHealth campaign, we’ve invited British Columbians to share their stories about the lack of Covid safety in BC – particularly the loss of mask protections in healthcare. Many wrote directly to policy makers. Some generously gave us permission to share their stories with the public and the press.

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pandemic myths

Ten COVID Facts Health Officials Dangerously Downplay

Published December 21, 2022

Published by: The Tyee
Published on: December 21, 2022
By Andrew Nikiforuk

Do not listen to powers that be who pretend that getting infected with COVID multiple times is now no big deal. They’re asking you to lower your guard for a nasty virus that can invade the brain, disregulate the immune system and damage the vascular system.

This strategy has led to predictable results — more direct deaths, more excess deaths, more disease and some 1.4 million Canadians reporting some form of long COVID over the last two years.

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One of Long COVID’s Worst Symptoms Is Also Its Most Misunderstood

Published September 12, 2022

Published by: The Atlantic
Published on: September 12, 2022
By Ed Yong

Brain fog isn’t like a hangover or depression. It’s a disorder of executive function that makes basic cognitive tasks absurdly hard.

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six years

COVID-19 Is Six Today. What We’ve Learned

We need cleaner air, which requires changes in medical culture.

Published December 31, 2025

Published by: The Tyee
Published on: December 31, 2025
By Crawford Kilian

Last year on this date, I published a Tyee article about the fifth anniversary of the first public announcement of what we now know as COVID-19.

My conclusions then were that we hadn’t learned much from the experience. A year later, many of us have unlearned the value of vaccination. Outbreaks of measles and whooping cough have predictably followed. Alberta has stopped reporting COVID-19 in hospitals.

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Lyme disease

Lyme disease research at Johns Hopkins in jeopardy due to federal funding delays

Published December 29, 2025

Published by: CNN / CTV News
Published on: December 29, 2025

MARYLAND (WJZ) — Maryland has some of the highest cases of Lyme disease in the nation, yet funding for research is in jeopardy.

Lyme disease is the most common and fastest-growing vector-borne disease in the United States. Approximately 476,000 Americans are diagnosed and treated for it each year, according to the Centres for Disease Control and Prevention (CDC).

In Maryland, Lyme disease cases have nearly doubled since 2020, according to the latest data from the Maryland Department of Health.

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Alberta

Masks now required for patients, visitors at 4 Edmonton hospitals

Published December 23, 2025

Published by: CTV News
Published on: December 23, 2025
By Hannah Kavanagh

Alberta Health Services (AHS) has instituted a masking requirement for four hospitals in the Edmonton area.

An enhanced masking directive is in place at Glenrose Rehabilitation Hospital, Royal Alexandra Hospital, Stollery Children’s Hospital and the University of Alberta Hospital.

This means all patients, designated support persons and visitors must wear a mask in the emergency departments of the above acute care facilities. There are signs at the front entrance of each location signalling where enhanced masking is happening, AHS says.

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As H3N2 sweeps across Canada, what to know about flu’s heart attack risk

Published December 23, 2025

Published by: Global News
Published on: December 23, 2025
By Uday Rana

It’s more than just a bad cold: influenza can also raise your risk of a heart attack shortly after an infection, medical experts are warning as the H3N2 strain spreads rapidly in Canada.

At the same time, flu season is coinciding with another risk factor for heart attacks – shovelling snow.

“Any time you get an infection, including a viral infection, there’s the release in your body of molecules that both trigger inflammation and sustain inflammation. And part of that is an increased tendency for your blood to clot,” said Dr. Fahad Razak, internal medicine physician at St. Michael’s Hospital and professor at the University of Toronto.

“That can have immediate effects within the weeks following an infection, resulting in things like strokes or heart attacks.”

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indoor air quality

Schools must improve air quality to slow spread of respiratory illness, advocates say

Published December 23, 2025

Published by: The Globe and Mail
Published on: December 23, 2025
By Dave McGinn

Heather Hanwell’s 12-year-old daughter recently missed almost two weeks of school after being hit hard by a viral infection. She’s among many parents who are caring for sick kids this flu season, which so far has seen a surge of cases among school-age children.

But the experience was particularly frustrating for Dr. Hanwell, an epidemiologist who says that improving the air quality in schools would help reduce the spread of contagious respiratory illnesses.

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indoor air quality

Schools have become cesspools for cold and flu, but they don’t have to be: Ontario School Safety

Published December 21, 2025

Published by: CityNews
Published on: December 21, 2025
By Rachel Morgan

The volunteer-led organization Ontario School Safety is renewing calls to the Ontario government to improve indoor air quality in schools.

The call comes as Ontario sees a rapid increase in cases of the flu, particularly impacting young children.

In April, 2021, the Government of Ontario announced it was investing over $130 million, in addition to funds from the Canadian government, to upgrade school infrastructure to protect children from COVID-19. The majority of this funding was earmarked for ventilation projects to improve indoor air quality.

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Flu season has hit Canadians hard and early, as cases continues to rise

Published December 19, 2025

Published by: The Globe and Mail
Published on: December 19, 2025
By Alanna Smith

At a neighbourhood Christmas party in Ottawa earlier this month, there were all the usual holiday delights: festive decor, treats and even a visit from the big man up North. It was an evening to remember for Christine Guptill, but not in the way she had imagined.

Tucked into a party room at Royale Ranch, a horse farm in the city’s south, there were nearly 40 people at the party – half children, half adults. Ms. Guptill said some children were coughing and she overheard one family say they had left their sick kid at home.

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Flu hospitalizations expected to ‘increase sharply,’ officials warn, as cases surge and vaccinations lag

Published December 19, 2025

Published by: CBC News
Published on: December 19, 2025

The Latest

Data from the Public Health Agency of Canada released today shows the number of flu outbreaks across the country is still rising, and hospitalizations due to the virus are set to surge in the coming weeks.
Health officials across the country are reporting a surge in cases of influenza this month, especially among children and youth.
There’s particular concern about low vaccination uptake this winter, with many provinces reporting only around 20 per cent of eligible residents have received the flu vaccine.
This year’s available vaccine isn’t a good match for the current predominant strain, H3N2 — but doctors are urging people to get their shots regardless.
Got a question about flu season? Send it to ask@cbc.ca.

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Workplace exposures tied to higher risk of long COVID

Published December 18, 2025

Published by: CIDRAP
Published on: December 18, 2025
By Laine Bergeson

Work-related factors may increase the risk of developing long COVID, according to a new population-based study from Spain.

The findings, published in BMJ Occupational & Environmental Medicine, suggest that the primary work-related drivers of increased long COVID risk were irregular or limited use of respirators, close contact with coworkers and/or the public, inability to physical distance, and use of public transportation to commute to work.

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Nova Scotia

Masks now required at all Nova Scotia Health sites

Published December 18, 2025

Published by: CTV News
Published on: December 18, 2025
By Natalie Lombard

Nova Scotia Health says masking is required throughout all its facilities beginning Thursday.

However, the health authority says masks are not required in:

administrative buildings
private offices, nursing stations, or conference rooms (if no patients are present)
cafeterias (when people are seated)
patient bed-spaces (for patients, partners, and visitors)

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Alberta

Alberta quietly ends public reporting of COVID outbreaks in acute care

Alberta’s government said the province is under no legal obligation to continue publishing the data in a “post-pandemic context.”

Published December 17, 2025

Published by: St. Albert Gazette
Published on: December 17, 2025
By Brett McKay

Alberta’s government quietly eliminated its public reporting dashboard of COVID-19 outbreaks in acute care facilities, saying the province is under no legal obligation to continue publishing the data in a “post-pandemic context.”

Alberta Health Services’ (AHS) acute-care outbreaks webpage provided weekly public reports on COVID-19 outbreaks in AHS and Covenant Health facilities, including the location where an outbreak had been reported, the date the outbreak was declared, the number of units affected, and how many patients and health-care workers were infected.

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Most Canadians still confident in vaccines, but hesitancy has increased, poll says

Published December 17, 2025

Published by: The Canadian Press
Published on: December 17, 2025
By Nicole Ireland

TORONTO – A new poll says that about three-quarters of Canadian adults still have confidence in vaccines, but hesitancy has increased over the last five years.

The survey conducted by Leger Healthcare and released on Tuesday says 74 per cent of respondents said they were either “very confident” (42 per cent) or “somewhat confident” (32 per cent) in the safety and effectiveness of vaccines.

But about a quarter of respondents said they are less confident than they were before.

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Occupational Factors Strongly Influence Long-COVID Risk

A large Catalan cohort study shows that healthcare, social care, education, retail, and transport workers are at higher risk for Long-COVID

Published December 16, 2025

Published by: ISGlobal
Published on: December 16, 2025

Work-related factors play a significant and independent role in the risk of developing Long-COVID, shows a new study based on the COVICAT cohort and led by the Barcelona Institute for Global Health (ISGlobal), a centre supported by “la Caixa” Foundation, in collaboration with the University of Turin and the Germans Trias i Pujol Institute (IGTP). The findings, published in BMJ Occupational & Environmental Medicine, highlight that a substantial share of Long-COVID could be prevented through targeted workplace measures and policies.

The public health impact of Long-COVID is far from over. Beyond ongoing infections that continue to cause illness and deaths worldwide, millions of people are living with lasting health consequences. Globally, around 6 in every 100 COVID-19 cases develop Long-COVID, amounting to 400 million affected people and an annual economic impact of roughly 1 trillion dollars, or 1% of the global economy.

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cognitive issues

COVID-19 leaves a lasting mark on the human brain

Published December 15, 2025

Published by: Griffith University
Published on: December 16, 2025
By Emma O’Connor

COVID-19 does not just affect the respiratory system, but also significantly alters the brain in people who have fully recovered from the infectious disease, highlighting the long-term neurological impact of the virus.

Researchers from Griffith University’s National Centre for Neuroimmunology and Emerging Disease (NCNED) used advanced MRI techniques to ascertain the neurological implications of COVID-19 compared with those who had never been infected.

The research provided compelling evidence that even in the absence of ongoing symptoms, prior infection with the virus could leave a measurable imprint on the brain.

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Ontario

3 children die from influenza A-related complications in Ottawa and eastern Ontario region

Published December 15, 2025

Published by: CTV News
Published on: December 15, 2025
By Josh Pringle

Three children have died from flu-related complications in the Ottawa area this month, as officials warn of a “rapid and significant rise” in influenza A cases.

In a statement released Monday morning, Ottawa Public Health said three children between the ages of five and nine have died from influenza A-related complications in the Ottawa and Eastern Ontario Health Unit regions during the first two weeks of December.

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