WASHINGTON (AP) — A U.S. government advisory panel has endorsed Pfizer’s coronavirus vaccine, in a major step toward an epic vaccination campaign that could finally conquer the outbreak. The Food and Drug Administration is expected to follow the recommendation issued Thursday by its expert advisers. The group concluded that the shot appears safe and effective against the coronavirus in people 16 and older. A final FDA decision is expected within days. Shots would then begin for health care workers and nursing home residents. Widespread access to the general public is not expected until the spring.