Variants of concern

Whether it’s Pfizer, Moderna or Astra Zeneca, the vaccines used in Canada ’are doing exactly what they should be doing,’ including against the Delta variant

An expert group has recommended using letters of the Greek alphabet like Alpha, Beta and Gamma as ’easy-to-pronounce and non-stigmatizing labels’ for COVID variants

How quickly it spreads, how it responds to vaccines and how we can stop it from causing a fourth wave in Canada

So far, evidence suggests it is more infectious, causes more severe infection, and evades immunity in those who have been previously infected