Canada’s herd immunity goal could rise to 90 per cent amid COVID-19 variant surge, official says
Health officials warned last week against loosening public health measures as new COVID-19 variants spread across Canada. Now, one official predicts herd immunity targets for vaccinations will also creep to higher levels.
Dr. Supriya Sharma, chief medical adviser with Health Canada, pictured in December 2020, says 'a lot of people' are refining estimates of herd immunity targets. The Hill Times photograph by Andrew Meade