Pfizer Inc.’s covid-19 vaccine remained highly effective after six months, according to new long-term results that the company said could be used to seek an expansion of its regulatory status.

The announcement Monday from Pfizer and its German partner BioNTech that their coronavirus vaccine appears to be 90% effective thrilled medical experts around the world and presented a glimmer of hope ...

Pfizer and BioNTech said Wednesday that initial lab tests show that the omicron variant partly escapes protection offered by the companies' two-dose regimen of their COVID-19 vaccine. However, those ...

The Food and Drug Administration has issued approval for a booster shot of Pfizer's COVID-19 vaccine for children as young as 12. The Pfizer vaccine is the first booster shot to receive emergency ...

NEW YORK (WABC) -- The European Union's drug regulator gave its backing to administering booster shots of the Pfizer-BioNTech COVID-19 vaccine for people 18 and older. The European Medicines Agency ...

Pfizer on Friday committed to supply up to 40 million doses of its COVID-19 vaccine this year to a World Health Organization-backed effort to get affordable shots to poor and middle-income countries.