Pfizer and BioNTech released more human data Friday indicating the omicron BA.5 boosters perform better than the old Covid shots. Stream NBC 5 for free, 24/7, wherever you are. People older than 55 ...

Pfizer will begin human trials of an omicron-specific COVID-19 vaccine beginning in late January, a company spokesperson confirmed Monday to FOX TV Stations. "We already have begun work on a DNA ...

Pfizer asked U.S. regulators Monday to expand use of its updated COVID-19 booster shot to children ages 5 to 11. Elementary school-aged children already received kid-sized doses of Pfizer’s original ...

The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...