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OTTAWA - Immunity against COVID-19 among vaccinated adult Canadians and those who have already contracted the virus has been waning throughout the
Immunity against COVID-19 among vaccinated adult Canadians and those who have already contracted the virus has been waning throughout the population, tests on donated blood have found.
OTTAWA—Immunity against COVID-19 among vaccinated adult Canadians and those who have already contracted the virus has been waning ...
Tests on around 9,000 donated blood samples from across Canada show that antibodies in the blood which fight the virus declined in October among all age groups, with experts saying the waning immunity is likely to have continued in November and December
“If it is strong and sustained in terms of immune memory it may have an impact on how we think about the need and timing of boosters.”