Canada’s chief public health officer Dr. Theresa Tam on Tuesday said they are still trying to determine the percentage of the population that should get vaccinated in order for it to be effective on a wide scale, but the international consensus is the 50 per cent mark.
She said clinical trials will likely help in better knowing that percentage level. But in terms of countries impacted the most where population immunity also appears quite low, coronavirus vaccine uptake will be important..
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