The idea of waning immunity has picked up steam in recent weeks, with some countries using it to justify rolling out third-dose COVID-19 vaccine boosters to their populations. But immunologists say the concept has been largely misunderstood.
A newly released report by Ontario’s COVID-19 Science Advisory Table has found that at least 57,000 to 78,000 people in the province had, or are currently experiencing, one of 200 post-COVID-19 conditions following their initial diagnosis.
A man who completed 21 days of mandatory quarantine upon returning to China from overseas has been identified as the likely source of a new outbreak, raising questions over the sustainability of the country's stringent zero-Covid strategy.
When Ontario’s COVID-19 vaccine passport rolls out on Sept. 22, individuals with medical exceptions must show proof confirming why they can’t get the shot. Ontario’s Ministry of Health tells CTV News Toronto that there are only two valid medical exemptions from COVID-19 vaccinations.