Influenza in Alberta: Cases up slightly, one new death reported

Doctors are worried that coronavirus may end up being like influenza, which requires a new vaccine every year both because the circulating strains mutate fast and because immunity from the vaccine wears off quickly. (Sergio Flores/Getty Images)
Doctors are worried that coronavirus may end up being like influenza, which requires a new vaccine every year both because the circulating strains mutate fast and because immunity from the vaccine wears off quickly. (Sergio Flores/Getty Images)

CTVNews.ca Top Stories