All coverage
Covid-19 numbers are improving, but infections could grow exponentially with Super Bowl gatherings
By Christina Maxouris & Holly Yan
Biden announces deal for 200 million more COVID-19 doses
By Alexander Tin
Thrombocytopenia After Getting a COVID-19 Vaccine
By Karen Pallarito
Pfizer hopes to cut vaccine manufacturing time by almost half
By Corky Siemaszko & Clare Boyle (Hiler)
Is It Safe to Delay a Second COVID Vaccine Dose?
By Marla Broadfoot
All COVID vaccines stop severe illness and death. Take what's offered.
By Michael Osterholm, Celine Gounder & Rick Bright