booster dose

noun

1. a supplementary injection of a vaccine given to maintain the immunization provided by an earlier dose

Example Sentences

Eligible groups were offered two main doses as a minimum, plus a booster dose, with additional boosters for more vulnerable groups later on in the pandemic.

From BBC

Eligible groups were offered two main doses as a minimum, plus a booster dose, with additional boosters for more vulnerable groups later on in the pandemic.

From BBC

Eligible groups were offered two main doses as a minimum, plus a booster dose, with additional boosters for more vulnerable groups later on in the pandemic.

From BBC

Federal health officials say U.S. adults 65 and older who got a shot of the updated COVID-19 vaccine in the fall should get a booster dose now, if at least four months have passed.

From Los Angeles Times

And California officials require a booster dose for students entering seventh grade.

From Los Angeles Times