Parents in the United States who want to vaccinate their young children against Covid-19 this fall may face a growing set of ...

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

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 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 ...

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 ...

Covid-19 levels are on the rise in the US, with transmission increasing in at least 45 states. Yet people who want to get vaccinated this fall may face a growing set of obstacles. Last week, the CDC ...

The top public health officials during Trump's first term praised mRNA vaccines. In the second term, officials seem to be retreating from them.