Blood donation organizations to provide important assessment of how long immunity lasts   NEWS RELEASE   MONTREAL, May 27, 2021 — Results from the latest Canadian Blood Services and Héma-Québec studies, which together cover all 10 provinces, confirm that from coast-to-coast, Canada’s overall levels of seroprevalence due to SARS-CoV-2 infection remained very low earlier … Continue reading Recent blood donor data suggest that Canadians still remain vulnerable to SARS-CoV-2 infection