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Synonyms

booster dose

British  

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This was six months after participants received the third yearly booster dose of the vaccine candidate under development, called VLA15.

From The Wall Street Journal • Nov. 26, 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.

From Salon • Sep. 5, 2025

R21/Matrix-M, developed by the Jenner Institute at Oxford University, uses three doses administered four weeks apart and a booster dose given after one year.

From BBC • Dec. 2, 2024

And while the FDA did allow seniors and others at high risk to get an extra booster dose this spring, most people will be many months beyond their last shot by fall.

From Seattle Times • Jun. 15, 2023

County also still requires healthcare workers to complete their primary vaccine series and get at least one booster dose, or else receive an exemption from their facilities.

From Los Angeles Times • Apr. 7, 2023