Canada probing whether delaying second COVID-19 vaccine doses could help more people
OTTAWA -- Canada's chief public health officer says she has asked the national vaccine advisory panel to investigate if there is merit to delaying second doses of COVID-19 vaccines in a bid to get more people vaccinated faster with first doses.
The request comes after the United Kingdom said it will delay the second doses of vaccines from Pfizer-BioNTech and AstraZeneca, up to 12 weeks.
Pfizer-BioNTech's product is supposed to be given in two doses 21 days apart, and AstraZeneca's in two doses 28 days apart.
Health Canada has not yet authorized AstraZeneca's vaccine candidate but approved Pfizer-BioNTech's on Dec. 9 and another from Massachusetts-based biotech firm Moderna on Dec. 23.
A written statement from Pfizer says ultimately alternative dosing decisions are up to local health authorities, but that the company has no evidence protection after the first dose remains in place after 21 days.
Tam says the National Advisory Committee on Immunization is being asked to provide analysis on what is known about the dosing regimens and what should be considered in deciding whether or not to delay the second doses.
Mia Rabson, The Canadian Press
- Health Canada agrees Pfizer-BioNTech vaccine vials have six doses
- Canada to get two million Pfizer-BioNTech vaccine doses as provinces expand rollouts
- First doses of Pfizer COVID-19 vaccine, not yet approved, to land in Canada next week
- Canada to receive 2M vaccine doses this week as Pfizer-BioNTech ramp up deliveries
- Vaccine deliveries slow this week as Canada expecting 600K Pfizer doses
- 100% of recent Mississauga and Brampton COVID patients not fully vaccinated
- 1 in 3 Canadians considering 'workarounds' as Mississauga, Brampton and Hamilton house prices keep rising
- Police investigating "reports of possible gunshots" in Brampton
- Mississauga grandfather plans to share big lotto win with his children
- House fire in Brampton leads to police diverting traffic