Full Coverage
Pfizer and BioNTech start trials of new Omicron-specific jab
By Philippa Roxby
CDC charts show hospitalization rates for unvaxxed, 2 doses, 3 doses
By Marianne Guenot
Moderna starts trial for Omicron-specific booster shot
By Devika Syamnath, Sherry Jacob-Phillips & Amruta Khandekar
As Pfizer and BioNTech begin clinical trial of Omicron-based vaccine, timeline to authorization is unclear
By Matthew Herper
Pfizer and BioNTech launch trial of Omicron-targeted COVID vaccine
By Michael Erman & Ludwig Burger