COVID-19, but the majority have just had a single dose so far.As of Friday, 259,847 doses of vaccine have been administered in the province, including 192,131 first doses and 67,716 second doses.But just how safe are you on a single dose of the vaccine?A letter by two Canadian experts published in the New England Journal of Medicine (NEJM) earlier this year stated that with a 92.6 per cent efficacy, the first dose of the Pfizer vaccine was “highly protective.” Is a single COVID-19 vaccine dose enough for those previously infected?
Several provinces, including Manitoba, have delayed their second doses in order to prioritize getting as many Manitobans vaccinated as possible.Dr.