vaccine effectiveness

People receive a dose of the COVID-19 vaccine at a mass vaccination clinic at Scotiabank Arena in Toronto on Sunday, June 27, 2021. THE CANADIAN PRESS/Cole Burston

Vaccines extremely effective against COVID variants of concern: Canadian study

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