Covid-19 vaccine boosters can begin for some US adults as CDC partially diverges from its advisers' recommendations

Following days of lengthy debate among vaccine experts, booster shots of the Pfizer/BioNTech Covid-19 vaccine can now be officially administered to some adults in the United States.

Early Friday morning, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky diverged from the agency's independent vaccine advisers to recommend boosters for a broader group of people -- those ages 18 to 64 who are at increased risk of Covid-19 because of their workplaces or institutional settings -- in addition to older adults, long-term care facility residents and some people with underlying health conditions.

The CDC recommendation includes the recommendations made by its Advisory Committee on Immunization Practices on Thursday, when it voted to recommend boosters for people age 65 and older and residents of long-term care facilities who received the Pfizer/BioNTech Covid-19 vaccine series at least 6 months ago, and people ages 50 to 64 with underlying medical conditions.