KALAMAZOO, Mich. -- Even though U.S. health officials authorized the emergency use of Pfizer's COVID-19 vaccine, getting the pandemic under control will take time and effort. One of the biggest steps ...

WASHINGTON — U.S. regulators approved updated COVID-19 shots Wednesday but limited their use for many Americans — and removed one of the two vaccines available for young children. The new shots from ...

The FDA and CDC recommended Pfizer booster shots for some groups, including elderly people, this week.

(AP) - The fall COVID-19 vaccine season is starting slowly for Pfizer, with U.S. sales of its Comirnaty shots sinking 25% after federal regulators narrowed recommendations on who should get them.

A third dose of the Pfizer/BioNTech COVID-19 vaccine can "strongly" boost protection against the delta variant -- beyond the protection afforded by the standard two doses, suggests new data released ...

SAN FRANCISCO -- As more people are eligible to get vaccinated, reports of side effects after the second Pfizer and Moderna shots are surfacing. Dr. Robert Wachter, chief of medicine at UCSF says many ...

Pfizer CEO Albert Bourla appeared on ABC's "This Week." Pfizer CEO Albert Bourla said on ABC's "This Week" Sunday it's possible to provide both COVID-19 booster shots as well as doses for people who ...

The children's parents discussed their decision with ABC News. Three American siblings have received their first dose of the Pfizer-BioNTech COVID-19 vaccine as part of global clinical trials for ...