Research into long COVID may benefit other fatigue syndromes that follow infections. These difficult to diagnose and treat disorders affect twice as many women as men. A symbol of sexism in medicine?

“When we started talking about long COVID at the end of 2020, patients told me how close it was to their symptoms,” says Durand, epidemiologist from the Université de Montréal who studied a cohort of patients with long COVID. “These are patients who for years had chronic fatigue, mental fog, abnormally low resistance to exertion. Doctors often told them it was in their heads. These are symptoms that are called “non-specific.” There are no diagnostic tests.”

These problems are often grouped under the term “acute post-infection syndrome.” “The idea is that there are things that have changed with the infection, and there are still sequelae that we can’t measure right now,” says Durand. “Since many people have had COVID-19, there are many cases of long COVID. We are talking about 15% of COVID-19 cases. So there’s a lot of funding for long COVID.”