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Quebec blood study finds about 600,000 caught COVID-19 by March, doubling official toll A new study from Héma-Québec reveals that approximately 600,000 Quebec adults had been infected with the coronavirus by the end of the second wave in March, a number twice as high as the official toll of reported cases. Social Sharing CBC News · Posted: May 27, 2021 6:13 PM ET | Last Updated: May 27 Héma-Québec examined 7,924 samples from people aged 18 years or older who made a blood donation between Jan. 25 and March 11.(Ryan Remiorz/The Canadian Press)

  TORONTO -- The latest attempt to draw conclusions about the spread of COVID-19 in Canada by analyzing blood donations suggests that racialized populations, young adults and residents of lower-income neighbourhoods are among the hardest-hit by the disease. The federal government's COVID-19 Immunity Task Force (CITF) has been monitoring the presence of COVID-19 antibodies in blood donated to Canadian Blood Services and Héma-Québec since early in the pandemic, in an attempt to find clues as to how far the novel coronavirus has spread across the country. Their latest findings, released T...

UBC begins mix-and-match study of Covid-19 vaccines in Canada 21 May 2021 (Last Updated May 21st, 2021 17:27) The University of British Columbia is set to study the effects of mixing different Covid-19 vaccines. Share Article The trial will enrol a total of 1,300 participants. Credit: The University of British Columbia. The University of British Columbia (UBC) has started a clinical study to assess the effects of mixing different brands of approved Covid-19 vaccines in Canada. Named MOSAIC, the study will examine the safety and effectiveness of ...

By meta-analysis, experimentally determined COVID-19 virus T cell epitopes were compared with sequences of common cold coronaviruses (CCCoVs). Only one CCCoV-matching epitope was repeatedly identified as highly immunogenic, namely the CD8+ T cell epitope VYIGDPAQL (''VYI'' peptide) if presented by the MHC class I allele HLA-A*24:02. Approximately 60% of Japanese individuals carry this allele, which in combination with previous CCCoV infections might help explain the surprisingly low prevalence of COVID-19 in Japan.

MONTREAL, May 19, 2021 (GLOBE NEWSWIRE) -- The Government of Canada, through its COVID-19 Immunity Task Force (CITF) and Vaccine Surveillance Reference...