By Asmau Ahmad
The United States Food and Drug Administration (FDA) on Tuesday amended the emergency use authorisations of the Moderna and Pfizer-BioNTech COVID-19 bivalent mRNA vaccines.
It, however, approved a second dose of the updated COVID-19 booster for older adults and people with weakened immune systems.
Those who are 65 and older can get a second dose of the updated versions of the Moderna and Pfizer-BioNTech booster at least four months following their initial bivalent dose, the FDA said in a statement.
According to the agency, most people who are immunocompromised can get an additional updated booster dose at least two months following their last dose.
It said that most unvaccinated individuals may receive a single dose of a bivalent vaccine, rather than multiple doses of the original monovalent mRNA vaccines.
The monovalent Moderna and Pfizer-BioNTech COVID-19 vaccines are no longer authorised for use in the U.S, says the FDA.
