All coverage
Health Canada says Pfizer's vaccine vials can be stretched to 6 doses
By John Paul Tasker
Thrombocytopenia After Getting a COVID-19 Vaccine
By Karen Pallarito
Don’t forget the most important vaccine stats: Prevented deaths and hospitalizations
By Kelsey Piper
All COVID vaccines stop severe illness and death. Take what's offered.
By Michael Osterholm, Celine Gounder & Rick Bright
Is It Safe to Delay a Second COVID Vaccine Dose?
By Marla Broadfoot
Pfizer hopes to cut vaccine manufacturing time by almost half
By Corky Siemaszko & Clare Boyle (Hiler)