Tag: booster dose

The US Food and Drug Administration (FDA) has authorized boosters of the Pfizer or BioNTech and Moderna Covid-19 vaccines for all adults. ....

Two-shots of a Covid vaccine may not be enough against the Omicron variant, and a third dose or a booster shot is necessary to prevent the super mutant variant, according to a UK study. ....

The efficacy of boosters against Covid-19 will likely decline over time, and people may need a fourth shot to increase their protection, Moderna CEO Stephane Bancel has said. ....