Under Robert F. Kennedy Jr., federal officials may withdraw an endorsement for the vaccine in younger children.

Pfizer also said it is working to improve its existing vaccine formulation, developed jointly with Germany's BioNTech, based on the vaccine's reaction to new COVID-19 variants that arise.

The US Centers for Disease Control and Prevention updated its recommendations for the Pfizer/BioNTech Covid-19 vaccine booster on Wednesday to include children as young as 12, at least five ...

Pfizer’s clinical trials in children 5 to 11 did not measure the vaccine’s effectiveness against COVID-19. Effectiveness was “never the intended primary endpoint,” Anderson said.

London — U.S. drugmaker Pfizer said Monday that human trials suggest its coronavirus vaccine is 90% effective at preventing COVID-19 infections in people not known to have had the virus ...

A technician inspects vials of coronavirus disease (COVID-19) vaccine candidate BNT162b2 at a Pfizer manufacturing site in manufacturing site in St. Louis, Missouri, U.S. in an undated ...

The completion of this study could positively impact Pfizer and BioNTech’s stock performance, as successful results may lead to new vaccine offerings, enhancing their market position. This development ...

COVID-19 activity is rising in much of the country. Data shows overall respiratory virus spread is very low in the U.S.