the results are based on population seropositivity — “the proportion of people with antibodies to sars-cov-2 in their blood,” the report explained — using data from 21 studies that citf reviewed. the report showed that prior to omicron, just seven per cent of canadians had antibodies from being infected by the virus. the proportion rose by 45 per cent from december 2021 to may 2022.
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even though vaccines are helpful against infection, there are still millions of adults who haven’t had a third shot, he added. this comes after federal health officials urged canadians to get boosted last week.
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