Canada’s immunity task force takes aim at pressing COVID-19 questions

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After one week on the job, members of the federal government’s new immunity task force say they are coming to grips with a towering wall of uncertainty that obscures the true extent of COVID-19 in Canada.

With more than 50,000 confirmed cases across the country and likely many more that have gone unreported, scientists are certain there is a population of individuals in Canada that have acquired some level of immunity to the new coronavirus that causes COVID-19. What remains unclear is the size and makeup of that population, the level of immunity it has developed and for how long.

https://www.theglobeandmail.com/canada/article-canadas-immunity-task-force-takes-aim-at-pressing-covid-19-questions/