Infectious disease specialist and virologist Dr. Samira Mubareka says the presence of seemingly more infectious coronavirus variants in Canada is a public health emergency and existing public health rules around social distancing, masks, and hygiene may have to be tightened.

The Dose

What do I need to know about the new COVID variants?

A weekly look at the health news that matters to you. Dr. Brian Goldman brings you the best science from top experts in plain language. He cuts through the BS and confusion to give you a dose of smart advice that you won’t find anywhere else. New episodes every Thursday.