Month: July 2025

Published by: The Canadian Press
Published on: July 31, 2025
By Nicole Ireland

TORONTO – The Public Health Agency of Canada says this year’s first human case of West Nile virus acquired within the country has been confirmed in Toronto.

The confirmation comes after Toronto Public Health said its first laboratory-confirmed case of the virus in 2025 is an adult resident of the city with no travel history.

The virus is transmitted to humans through infected mosquitoes.

PHAC’s West Nile surveillance report says that as of July 12, two other Canadian residents were infected this year while travelling outside of the country.

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vaccines

Analysis: 2024-25 COVID vaccines offered strong protection against worst outcomes in seniors

Published July 31, 2025

Published by: CIDRAP
Published on: July 31, 2025
By Stephanie Soucheray

The 2024-25 COVID mRNA vaccines targeting JN.1 were highly effective in protecting against hospitalization and death for at least 4 months in a cohort of Danish citizens aged 65 and older by October 1, 2024. The new analysis estimating the vaccine efficacy (VE) of last season’s COVID vaccines was published earlier this week in The Lancet Infectious Diseases.

In total, 894,560 Danish residents were included in the study, with a median age of 76. By Jan 31, 2025, 820,229 (91.7%) of the participants had received a JN.1 vaccine. Among those without updated JN.1 vaccination (74,331), 278 COVID-19 hospitalizations and 84 deaths were observed during 25.6 million person-days.

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long COVID

Biological causes of long COVID discovered: the virus persists for months in the brain

Published July 31, 2025

Published by: Sciences et Avenir
Published on: July 31, 2025
By Camille Gaubert

Long COVID, often attributed to a psychosomatic mechanism, has biological causes, a study reveals. Months after the infection, the virus was still active, at low levels, in the brainstem of hamsters.

“We hope to bring relief to the patients who may have heard that they are not sick, that it is ‘in their heads.’ What we are showing in the laboratory is that long COVID has a biological cause!,” says Guilherme Dias de Melo, a veterinarian and researcher in infectious diseases and neuropathologies at the Institut Pasteur. Eighty days after the initial infection, the COVID-19 virus was found, still infectious, in the brainstems of hamsters affected by symptoms similar to those of long COVID, according to the work that he has directed and published in the journal Nature Communications.

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cancer

COVID infection early in pandemic linked to higher risk of cancer death, CU study finds

Published July 30, 2025

Published by: The Denver Post
Published on: July 30, 2025
By Meg Wingerter

Cancer survivors infected with COVID-19 in the early months of the pandemic had a higher risk of dying from dormant cells reawakening, Colorado researchers found, though they don’t know whether people who get the virus now face the same risk.

Experiments in mice found that genetically modified animals were more likely to have signs of metastatic cancer in their lungs if infected with flu or COVID-19 than engineered mice that researchers didn’t give a virus, said James DeGregori, deputy director of the University of Colorado Cancer Center in Aurora.

That finding launched an international partnership to determine whether the same thing happened in people, he said.

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cancer

‘Sleeping’ cancer cells in the lungs can be roused by COVID and flu

Published July 30, 2025

Published by: Nature
Published on: July 30, 2025
By Max Kozlov

Hidden in the lungs of some breast cancer survivors are tumour cells that can remain dormant for decades — until they one day trigger a relapse. Now, experiments in mice show that these rogue cells can be roused from their slumber by common respiratory illnesses such as COVID-19 or the flu.

The findings, published in Nature on 30 July¹, seem to extend to humans too: data from thousands of people show that infection with the coronavirus SARS-CoV-2 is linked with a nearly twofold increase in cancer-related death, possibly helping to explain why cancer death rates increased early during the COVID-19 pandemic.

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Trump regime

Controversial FDA official Dr. Vinay Prasad departs agency

Published July 29, 2025

Published by: CNN
Published on: July 29, 2025
By Meg Tirrell, Sarah Owermohle, Adam Cancryn

Dr. Vinay Prasad, the controversial critic of the US Food and Drug Administration who took a top role at the regulatory agency in May, has resigned less than three months into the job.

“Dr. Prasad did not want to be a distraction to the great work of the FDA in the Trump administration and has decided to return to California and spend more time with his family,” a spokesperson for the US Department of Health and Human Services told CNN on Tuesday.

Prasad, a hematologist oncologist, was named head of the FDA’s Center for Biologics Evaluation and Research in early May, giving him purview over vaccines and biologic medicines. He was subsequently also given the role of FDA chief medical and scientific officer. Like a number of Trump administration health appointees, Prasad had been a harsh critic of the government’s response and vaccine policies during the Covid-19 pandemic.

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long COVID

B.C. plans to cut payments for long-COVID clinics, leaving patients in lurch

Published July 27, 2025

Published by: Victoria Times Colonist
Published on: July 27, 2025
By Alec Lazenby, Vancouver Sun

A virtual clinic that treats patients for long COVID and other chronic conditions is warning that it may have to partially shut down if the province goes ahead with changes on Sept. 1 that would limit the number of patients who can take part in online group appointments.

The B.C. Centre for Long COVID, ME/CFS & Fibromyalgia, run by internal medicine doctors Ric Arseneau and R. Jane McKay, treats 5,000 patients for a variety of chronic diseases, such as myalgic encephalomyelitis, which causes extreme fatigue, and PoTS, a heart rate condition.

After each patient goes through an initial one-on-one consultation, follow-up appointments can take the form of a virtual group medical visit of up to 12 patients, where either Arseneau or McKay take at least one to two questions per patient, or a group medication visit of up to 50 patients, which allows for presentations on different medications and then takes questions from patients.

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Quebec

Wildfires: Montreal has the worst air quality in the world

Published July 26, 2025

Published by: Radio-Canada
Published on: July 26, 2025
By Patrick MacIntyre

Smoke from forest fires is responsible for poor air quality in southern Quebec, northern Ontario, Manitoba and Saskatchewan. Montreal is also on Saturday the city where air quality is the worst in the world, according to IQAir’s ranking.

With a score of 191, Montreal ranks first, ahead of cities like Kinshasa in Congo and Manama in Bahrain. Toronto is also part of the top 10, it ranks 8th with a score of 110.

A score between 101 and 150 on the IQAir index indicates that conditions are poor for vulnerable people. If the index is higher than 150, the conditions are bad for everyone’s health.

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labour rights

Human Rights Tribunal Affirms Immunocompromised Worker’s Right to Seek Workplace Accommodations

Published July 22, 2025

Published by: PressProgress
Published on: July 22, 2025
By Emma Arkell

A human rights tribunal has found that an employer’s failure to provide accommodation for an immunocompromised worker amounted to discrimination on the basis of disability.

The April decision by the BC Human Rights Tribunal affirmed that immunodeficiency is a physical disability, and that in raising concerns about his immunodeficiency multiple times, the worker who brought the case forward had given his employer enough information to trigger the employer’s responsibility to look into ways to accommodate that disability.

Gabrielle Peters, a disabled writer and policy analyst based in Vancouver, praised the decision as broadening the discussion of what it means to create an accessible workplace.

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Manitoba

Wildfire smoke leads to air quality warnings for much of Manitoba this weekend

Published July 19, 2025

Published by: CBC News
Published on: July 19, 2025
By Santiago Arias Orozco

Smoke billowing from wildfires is leading to poor air quality and reducing visibility throughout most of Manitoba this weekend.

Environment and Climate Change Canada issued warnings Saturday morning for a large swath of the province, including Winnipeg and Brandon in the south, the Interlake and Thompson in the north.

“We have asthma so we try to just like think about how our chest is feeling … and go from there,” Aleecia Doyle said of she and her son, Liam Doyle. The pair ventured to Old Market Square to catch some of the entertainment for Winnipeg Fringe Theatre Festival opening weekend.

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vaccines

New COVID-19 vaccine candidate shows strong protection against multiple variants

Published July 18, 2025

Published by: Centenary Institute
Published on: July 18, 2025

A promising new COVID-19 vaccine candidate developed by researchers at the Centenary Institute and the University of Sydney has shown strong potential to protect against both current and emerging coronavirus variants. By targeting features shared by a range of coronaviruses, the vaccine is designed to offer broader and longer-lasting protection as the virus continues to evolve.

The development comes as Australia faces continued COVID-19 circulation during winter, with new Omicron subvariants such as XBB.1.5 contributing to infections and hospitalisations. To date, there have been over 115,000 COVID-19 cases reported to the Australian Government’s National Notifiable Diseases Surveillance System for 2025.

Published in the scientific journal npj Vaccines, the new study shows that the vaccine candidate, named CoVEXS5, protected mice from multiple coronaviruses, including the highly immune-evasive Omicron XBB.1.5 variant and SARS-CoV-1, a relative of SARS-CoV-2 that was responsible for the 2002–2004 SARS outbreak.

In laboratory tests, CoVEXS5 reduced virus levels in the lungs of infected mice by approximately 99.9% compared to unvaccinated controls, demonstrating a dramatic protective effect.

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cognitive issues

COVID hospitalization linked to cognitive impairment 2 years later

Published July 17, 2025

Published by: CIDRAP
Published on: July 17, 2025
By Stephanie Soucheray

Almost 20% of people who were hospitalized for COVID-19 infections early in the pandemic still had signs of impairment with brain function 2 years after infection, finds a new study in Scientific Reports.

The study population came from Portugal, in a region hit hard by the first wave of the COVID-19 pandemic. Based on hospital admission episodes and SARS-CoV-2 infection status from March 2020 to February 2021, the authors identified four groups: group 1 (101) hospitalized for COVID-19 infections, group 2 (87) hospitalized but uninfected with COVID-19, group 3 (252) infected but not requiring hospitalization, and group 4 (258) uninfected and not hospitalized for any reason.

Cognitive assessments were conducted in two parts 2 years after infection, a general screening using the Montreal Cognitive Assessment and a subsequent neuropsychological assessment conducted by one of four psychologists if the score of the general screening was low. Overall, verbal memory, visual memory, executive functions, language, and information processing speed and attention were evaluated.

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British Columbia

B.C. health minister praises U.S. recruitment, says 780 applications in 2 months

Published July 16, 2025

Published by: CTV News / The Canadian Press
Published on: July 16, 2025

VANCOUVER — British Columbia’s health minister says the province has received almost 780 job applications from qualified American health professionals as part of its recruitment campaign.

Josie Osborne says more than 2,250 doctors, nurses and other health professionals have signed up for webinars and expressed interest in working in B.C. since March.

Bylaw changes implemented by the College of Physicians and Surgeons of B.C. this month mean U.S.-trained doctors can become fully licensed in B.C., without further assessment if they hold certifications from various American medical boards.

Osborne says that means Canadian doctors trained in the U.S. can “come home” and the path also becomes easier for American physicians.

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Alberta

Alberta wastewater unlocked key information about COVID-19. Could it help with measles too?

Published July 16, 2025

Published by: CBC News
Published on: July 16, 2025
By Jennifer Lee

As Alberta’s measles outbreaks grow, researchers are now watching the province’s wastewater for the highly contagious virus and hoping to determine if the technology could eventually serve as an early detection tool.

The magnitude of Alberta’s outbreaks and the speed at which cases are climbing has sparked widespread concern. As of midday Tuesday, 1,323 cases had been confirmed since the outbreaks began in March.

Piggybacking off weekly wastewater samples, collected through the provincial COVID-19 surveillance program, the team has designed a test that can identify both the wild type measles virus (indicating actual infection) and vaccine-related shedding in the wastewater.

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vaccines

Study finds no link between aluminum in vaccines and autism, asthma

Published July 14, 2025

Published by: NBC News
Published on: July 14, 2025
By Kaitlin Sullivan

Aluminum in childhood vaccines is a target of vaccine skeptics, who blame the ingredient on myriad health concerns. But a study of more than 1 million people, published Monday in the Annals of Internal Medicine, found no link between aluminum in vaccines and an increased risk of 50 chronic conditions, including autoimmune diseases, allergies and autism.

Health and Human Services Secretary Robert F. Kennedy Jr., who has spread vaccine misinformation for years, said on a podcast in 2024 that aluminum in vaccines is “extremely neurotoxic.” (An HHS spokesperson did not respond to a request for comment.)

Senior study author Anders Hviid said that, as a parent, he understood the concerns about vaccine safety.

“Our study addresses many of these concerns and provides clear and robust evidence for the safety of childhood vaccines. This is evidence that parents need to make the best choices for the health of their children,” said Hviid, who is a professor and the head of epidemiology research at Statens Serum Institut, a sector of the Danish Ministry of Health focused on combating and preventing infectious diseases.

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Saskatchewan

Saskatoon under air quality warning as wildfire smoke blows in from the north

Published July 14, 2025

Published by: CTV News
Published on: July 14, 2025
By Rory MacLean

Saskatoon residents are feeling the lingering effects of the province’s northern wildfires on Monday, as a northerly wind has blown heavy smoke into central Saskatchewan.

Environment and Climate Change Canada issued an air quality warning after 4 a.m. Monday, advising anyone likely to be affected by smoke, including infants and young children, seniors, people with chronic conditions and those who work outdoors to limit time outside and seek medical attention if they experience symptoms.

The air quality index for the day is listed as 10-plus — considered a very high risk to health.

“During heavy smoke conditions, everyone’s health is at risk regardless of their age or health status,” Environment Canada said.

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measles

Alberta’s measles outbreaks surpass case counts reported for entire U.S.

Published July 14, 2025

Published by: CBC News
Published on: July 14, 2025
By Jennifer Lee

Alberta has now confirmed more measles cases than the entire United States has reported this year.

The province has been battling outbreaks since March and as of noon Monday, total case counts in the province had ballooned to 1,314.

The latest update from the U.S. Centers for Disease Control and Prevention shows that country has amassed 1,288 cases this year.

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air quality

Toronto has some of the worst air quality in the world right now — and a new study says smog and wildfire smoke can damage your heart

Published July 14, 2025

Published by: Toronto Star
Published on: July 14, 2025
By Omar Mosleh

With the city once again blanketed in wildfire smoke, experts are warning that long-term exposure to air pollution can lead to higher risk of heart failure.

Environment Canada issued a special air quality statement on Sunday night due to wildfire smoke from northern Ontario pushing Toronto’s Air Quality Health Index to 10+, classified as “very high risk.” Poor air quality was expected to persist Monday and possibly into Tuesday.

The effects of air pollution on the heart are underscored in a recent study, which found that long-term exposure to air pollution, in particular fine particulate matter, was linked to higher levels of diffuse myocardial fibrosis, a type of heart scarring that can lead to higher risk of heart failure.

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Month: July 2025

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