WASHINGTON - A US Centers for Disease Control and Prevention (CDC) advisory panel on Thursday endorsed booster doses of the Pfizer-BioNTech COVID-19 vaccine for Americans aged 65 and older and some adults with certain high risk conditions.

The panel voted 15-0 to recommend a booster dose for Americans age 65 and older and people in long term care facilities. It also fully recommended giving a single booster dose to people between the ages of 50 and 64 with certain high risk conditions, by a vote of 13-2.

On Wednesday, the Food and Drug Administration approved Pfizer boosters for people aged 65 and older or at high-risk. The extra dose would be given once they are at least six months past their last Pfizer shot.

CDC Director Rochelle Walensky is expected to accept the panel's endorsement shortly.