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 ...

Pfizer and BioNTech said Monday that late-stage trials of its COVID-19 vaccine in children show that the shots were safe and effective in kids aged between 5 and 11. The results mark a key step in ...

To help answer common vaccine questions, we consulted Dr. Stanley Perlman, a professor at the University of Iowa’s Carver College of Medicine and a member of the U.S. Food and Drug Administration’s ...

Pfizer Inc. and BioNTech SE have announced that their mRNA-based vaccine candidate, BNT162b2, against SARS-CoV-2 has demonstrated evidence of efficacy against COVID-19 in participants without prior ...