More than a year after its promised deadline to investors, drugmaker puts alarming results in federal government's "virtual ...

Pfizer's mRNA flu vaccine worked better than a standard flu shot in a large Phase 3 trial, researchers reported in the results of a clinical trial.

NEW YORK, N.Y. – Pfizer Inc. on Monday released detailed analyses of myocarditis cases linked to its COVID-19 vaccine, ...

LOS ANGELES -- The COVID-19 vaccines made by Pfizer and Moderna both require two doses to be administered, several weeks apart, for them to be fully effective. But there has been some scientific ...

Dramatic changes wrought by health secretary Robert F. Kennedy Jr. on vaccine regulation in the U.S. are making this year’s launch of the updated Covid-19 shots the rockiest in years, with sharply ...

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 ...

Pfizer-funded study finds a next-gen mRNA flu shot works better against current strains — but causes more short-term side effects.

Pfizer's coronavirus vaccine could face some headwinds in the near future. The company will enter a period of patent cliffs ...

Vaccine experts said the memo was irresponsible and omits key details about how officials arrived at the conclusion.

Pfizer (PFE) announced it does not anticipate significant changes to U.S. vaccine policy under the incoming Trump administration, despite vaccine skeptic Robert F. Kennedy Jr.’s nomination to lead the ...

The vaccine needs to be stored at around -70 degrees Celsius. Early data revealed Monday that Pfizer's COVID-19 vaccine candidate could be up to 90% effective. The company still needs to submit its ...