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 ...

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 ...

(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 ...