The FDA has expanded the emergency use authorizations (EUAs) for the Moderna and Johnson & Johnson COVID-19 vaccines to allow for the use of a single booster dose among certain populations. The Moderna vaccine may now be administered at least six months after completion of the primary vaccine series to individuals 65 years of age and older, individuals 18-64 years of age at high risk of severe COVID-19, and individuals 18-64 years of age with frequent institutional or occupational exposure to COVID-19. The Johnson & Johnson vaccine may be administered at least two months after completion of the single-dose primary regimen to any individual aged 18 or older. Furthermore, the FDA clarified that after finishing an initial vaccination regimen, individuals may mix and match which vaccine they use for a booster dose.
