US allows emergency COVID-19 vaccine in bid to end pandemic

This May 4 photo provided by the University of Maryland School of Medicine shows the first patient enrolled in Pfizer’s COVID-19 coronavirus vaccine clinical trial at the University of Maryland School of Medicine in Baltimore. The U.S. gave the final go-ahead Friday to the nation’s first COVID-19 vaccine, marking what could be the beginning of the end of an outbreak that has killed nearly 300,000 Americans.

File photo