As cases of the Omicron variant surge and Canadians race to secure COVID-19 booster shots, questions are being raised about how long it takes for third doses to become effective and what to do if someone contracts the virus before being able to get their jab. Here’s what some health experts say:
Once you get your booster, how soon does it start to take effectThe horizon, and they seem to be helping our southern neighbours.?
With the first two doses of a COVID-19 vaccine, Ontario’s top doctor said it takes 14 days for the shots to boost immunity. But with a booster dose, Dr. Kieran Moore said immunity against COVID-19 typically increases sooneran associate professor of health.
“We know with the booster dose … within five to seven days, you have a significant rise in your antibody production. And your memory cells are re-triggered against COVID,” Moore said at a press briefing Tuesday.