SARS-Cov-2 variants of concern more virulent than the native strain of the virus

… are more virulent than the native strain of the virus, … 47;cmaj.211656.
“Canada is battling a different pandemic … vaccination rates in Canada by extending vaccine mandates and … study in Ontario, Canada. Canadian Medical Association Journal. doi.org…… are more virulent than the native strain of the virus, … 47;cmaj.211656.
“Canada is battling a different pandemic … vaccination rates in Canada by extending vaccine mandates and … study in Ontario, Canada. Canadian Medical Association Journal. doi.org…