: a supplementary dose of an immunizing agent administered as an injection
called alsobooster, booster dose
Example Sentences
He had to get two booster shots at his latest checkup.
Recent Examples on the WebMany Americans — including the vast majority of people younger than 50 — got their last COVID-19 vaccination or booster shot more than half a year ago.Los Angeles Times, 6 Sep. 2022 However, British health authorities also said people should take whatever booster shot is offered to them as all shots, including the original versions, still offer very good protection against severe illness from COVID. Lyubov Pronina, Fortune, 31 Aug. 2022 The study found the shot generated a significant amount of antibodies in humans compared with the company’s currently available booster shot. Liz Essley Whyte, WSJ, 28 Aug. 2022 Getting a booster vaccine now won't prevent you from signing up for the upcoming bivalent vaccine booster shot later this winter. Zee Krstic, Good Housekeeping, 28 Aug. 2022 On Monday, the U.K. became the first country to approve a bivalent vaccine booster shot for adults, which would target both the original COVID virus and the Omicron variant. Abc News, ABC News, 16 Aug. 2022 This spring, people above age 50 who'd received just one booster shot were dying from COVID at four times the rate of those who'd received two shots. The Week Staff, The Week, 14 Aug. 2022 The department announced on Friday an agreement to purchase 66 million doses of Moderna's bivalent booster shot for potential use in fall and winter. Naomi Thomas, CNN, 29 July 2022 Even if the booster shot were based on the delta variant, that variant passed through a long time ago. Dr. Keith Roach, oregonlive, 22 July 2022 See More
Word History
First Known Use
1944, in the meaning defined above
Medical Definition
booster shot
noun
: a supplementary dose of an immunizing agent administered as an injection
… the state is requiring older children to have additional booster shots for measles, mumps and rubella. Ann Schrader, The Denver Post