Tam hopeful for summer even as Canada hits grim death milestone in COVID-19 pandemic
OTTAWA — Canada’s chief public health officer said Tuesday she expects Canadians who got the Oxford-AstraZeneca in the first round of vaccinations will be able to choose which vaccine they get for their second dose.
Dr. Theresa Tam’s comments came hours after a small Spanish study on mixing and matching vaccines reported that giving a Pfizer-BioNTech shot for the second dose after AstraZeneca is safe and produced twice as many antibodies as a second dose of AstraZeneca.
The National Advisory Committee on Immunization, known as NACI, is still awaiting further data from another mixing-and-matching study underway in the United Kingdom, but Tam said advice on second doses should be ready before most people are due to get their second vaccination.
“It is likely that people in Canada who’ve received one dose of AstraZeneca will have a choice for their second dose,” she said at a news conference from Ottawa.


