The US Food and Drug Administration said Wednesday it would grant emergency use authorization for a booster dose of Pfizer’s Covid-19 vaccine in people 65 and older, people at high risk of severe disease and people whose jobs put them at risk of infection.

“After considering the totality of the available scientific evidence and the deliberations of our advisory committee of independent, external experts, the FDA amended the EUA for the Pfizer-BioNTech COVID-19 Vaccine to allow for a booster dose in certain populations such as health care workers, teachers and day care staff, grocery workers and those in homeless shelters or prisons, among others,” acting FDA Commissioner Dr. Janet Woodcock said in a statement.