COVID-19 variants, as early signs show a fall resurgence of the virus.At the House of Commons health committee, Dr. Theresa Tam says the Public Health Agency of Canada is keeping a careful eye on the evolution of Omicron variants, which are the most common subvariants in the country.Tam says in the early days of the pandemic the virus would mutate in all sorts of ways, because there was no immunity from previous infection or vaccines.
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