MONTREAL, Canada (AFP) — Pfizer-BioNTech submitted an authorization request to Health Canada on Monday for the use of its Covid-19 vaccine in children aged 5-11, the companies and the Canadian government said. “This is the first submission Health Canada has received for the use of a Covid-19 vaccine in this younger age group,” it said in a statement. The authorization request is based on data from trials conducted on 2,268 children in this age group […]