Results from CBS’s initial survey, conducted between May 9th and July 21st, 2020 showed that 552 of the 74,642 donors tested had detectable antibodies, which gave an adjusted seroprevalence of 7.7 per 1000 donors.
A large group of researchers found seroprevalence across Canada was low in the first wave of the pandemic but found 31% of those who tested positive for antibodies had never had symptoms. They also found the death rate in nursing homes was over 70 times greater than among elderly adults living outside of nursing homes.
Canadian Blood Services and the CITF’s collaborative nine-province SARS-CoV-2 seroprevalence study for October thru November suggests that 1.5 per cent of healthy Canadians had been exposed to SARS-CoV-2. The highest levels were recorded in Western Canada but mass national vaccination remains only route to achieving herd immunity.
Study suggests as few as 0.7% of adults have antibodies to SARS-CoV-2 Canadian Blood Services and Canada’s COVID-19 Immunity Task Force (CITF) are releasing final results of a collaborative nine-province SARS-CoV-2 seroprevalence study. This analysis, based on 37,373 blood samples from blood donor centres across Canada (except Quebec and the Territories), reveals that fewer than 1 [...]
An interdisciplinary group of health researchers, engineers, and economists has come together to gather and centralize seroprevalence data on one site, SeroTracker.
Canadian Blood Services and the CITF reveal that over the period May 9 through June 8, 2020, fewer than 1 per cent of the 10,000 samples from blood donors tested positive for antibodies to the novel coronavirus.