(AP) – A real-world test of Pfizer’s COVID-19 vaccine in more than half a million people confirms that it’s very effective at preventing serious illness or death, even after one dose. Wednesday’s ...

WASHINGTON — A former Pfizer scientist was subpoenaed Monday by House Republicans over allegations that senior executives at the pharma giant colluded to “deliberately slow down” clinical tests of its ...

Drug maker Pfizer says it's planning to start testing its COVID-19 vaccine on children as young as 12. This will be the first coronavirus vaccine trial to include children in the United States. The ...

Researchers at Cincinnati Children’s Hospital are starting phase-two testing of Pfizer’s COVID-19 vaccine to help determine the efficacy of the vaccine in children younger than 12 years old. Phase one ...

The drugmakers that developed the first COVID-19 vaccines hope to save Americans from an extra trip to the pharmacy with a single shot that targets both COVID and the flu. Pfizer and BioNTech announed ...

NEW YORK — Pfizer has started testing its potential COVID-19 treatment as a preventive medicine aimed at warding off the virus if a close contact gets it. The drugmaker said Monday that it will study ...