booster dose
noun
plural booster doses
: a supplementary dose of a therapeutic agent designed to increase the effectiveness of one or more previously administered doses
I take 162 mg a day, as well as a booster dose of 325 mg (one regular aspirin) once every two weeks instead of my usual dose.—
Andrew Weil
Andrew Weil
especially
: booster shot
Kansas providers are beginning to make plans for distributing thousands of COVID-19 booster doses, with the federal government indicating residents will begin getting those shots starting next month. —Andrew Bahl
Andrew Bahl Examples of booster dose in a Sentence
Recent Examples on the Web
Early reports flagged a type of heart swelling called myocarditis as a rare side effect of the mRNA vaccine, particularly for young men ages 18 to 25 after a booster dose.
—Deborah Fuller, CNN Money, 10 Sep. 2025
Early reports flagged a type of heart swelling called myocarditis as a rare side effect of the mRNA vaccine, particularly for young men ages 18 to 25 after a booster dose.
—Deborah Fuller, The Conversation, 3 Sep. 2025
The truth is, initial vaccines and booster doses have been shown to be very effective against reducing infection, hospitalization, and death from COVID-19.
—Simon Williams, Time, 15 Aug. 2025
Anyone visiting the affected countries who previously completed the full, routine polio vaccine series may also receive a single, lifetime booster dose of polio vaccine.
—Isabel Van Brugen, MSNBC Newsweek, 4 Aug. 2025
See All Example Sentences for booster dose
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Deborah Fuller, CNN Money, 10 Sep. 2025
Early reports flagged a type of heart swelling called myocarditis as a rare side effect of the mRNA vaccine, particularly for young men ages 18 to 25 after a booster dose.
—Deborah Fuller, The Conversation, 3 Sep. 2025
The truth is, initial vaccines and booster doses have been shown to be very effective against reducing infection, hospitalization, and death from COVID-19.
—Simon Williams, Time, 15 Aug. 2025
Anyone visiting the affected countries who previously completed the full, routine polio vaccine series may also receive a single, lifetime booster dose of polio vaccine.
—Isabel Van Brugen, MSNBC Newsweek, 4 Aug. 2025
See All Example Sentences for booster dose
Cite this Entry
“Booster dose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/booster%20dose. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
booster dose
noun
: a supplementary dose of a therapeutic agent designed to increase the effectiveness of one or more previously administered doses
When possible, the drug [prednisone] was administered every other day, with booster doses during hemolytic crises.—Russell E. Ware et al., The New England Journal of Medicine
Russell E. Ware et al., The New England Journal of Medicine
especially
: booster shot
… vaccines may have to receive a booster dose every five years after the original series. —Marsha F. Goldsmith, The Journal of the American Medical Association
Marsha F. Goldsmith, The Journal of the American Medical Association Love words? Need even more definitions?
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