Both the Pfizer-BioNTech and Moderna COVID-19 vaccines require two shots, so some provinces are setting aside doses to ensure the first recipients get their second shot. But as Abigail Bimman explains, two new studies suggest that’s not a good idea.
- Amid shortages, 2nd dose of Pfizer’s coronavirus vaccine can be delayed: WHO
- COVID-19 vaccines arrive in Guelph after confusion over delivery date
- Should provinces reserve COVID-19 vaccine 2nd doses or administer them all right away?