A new study suggests that 75 percent of Canadians had immunity to COVID-19 by March 2023.
“The evolution of SARS-CoV-2 seroprevalence in Canada: a time-series study, 2020–2023,” published Aug. 14 in the Canadian Medical Association Journal, said it collected data from more than 900,000 samples collected from seven research studies to estimate trends in infections with COVID across the country.
