WASHINGTON (AP) — A U.S. government advisory panel endorsed widespread use of Pfizer's coronavirus vaccine Thursday, putting the country just one step away from launching an epic vaccination campaign against the outbreak that has killed close to 300,000 Americans.

Shots could begin within days, depending on how quickly the Food and Drug Administration signs off, as expected, on the expert committee's recommendation.

"This is a light at the end of the long tunnel of this pandemic," declared Dr. Sally Goza, president of the American Academy of Pediatrics.

In a 17-4 vote with one abstention, the...