vaccination

noun vac·ci·na·tion \ ˌvak-sə-ˈnā-shən \

|Updated on: 6 Aug 2018

Definition of vaccination

1 : the act of vaccinating

2 : the scar left by vaccinating

Recent Examples of vaccination from the Web

As reports of the possible association started to emerge, researchers in other countries looked to see if there had been an increase in narcolepsy cases after their H1N1 vaccination campaigns were rolled out.

— helen branswell, STAT, "A stubborn medical mystery: Was pandemic flu vaccine tied to an increase in narcolepsy cases?," 5 July 2018
But vaccination campaigns in the DRC, with its remote villages, crumbling infrastructure, and weak health system, are tough.

— leslie roberts, Science | AAAS, "Alarming polio outbreak spreads in Congo, threatening global eradication efforts," 2 July 2018
Froehlich also discovered that the dogs didn’t receive their vaccinations and that some previously had roundworm, among other problems, the Republic reported.

— ryan gaydos, Fox News, "Wife of U-Haul billionaire allegedly dumps sick dogs on charity, agrees to pay medical bills after nasty spat," 27 June 2018
The puppy, named Chops, was neutered there and got its vaccinations.

— joe robertson and robert a. cronkleton, kansascity, "Jeremiah and Demonte, 'just kids,' mourned as victims of gun violence," 27 June 2018
Either way, the occurrence demonstrates the dangers of leaving holes in vaccination campaigns.

— The Economist, "[CORRECTED] Polio returns to Venezuela, and threatens the region," 16 June 2018
Congo’s vaccination campaign, which began in Mbandaka last week, is targeting more than 1,000 health workers and contacts of the sick in three health zones.

— saleh mwanamilongo, The Seattle Times, "Ebola vaccinations begin in Congo’s northwest town of Bikoro," 28 May 2018
Owners are required to sign a document certifying that their pets’ vaccinations are current, and accepting liability for their pet’s well being.

— rachel rabkin peachman, Condé Nast Traveler, "How to Travel Safely With Pets," 25 May 2018
One way to protect people with asthma and prevent missed work and school days is to stay up-to-date on your vaccinations.

— brittany britto, baltimoresun.com, "25 ways to make Baltimore better: Suggestions from Aaron Maybin, Leana Wen and more," 13 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vaccination.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of vaccination

earlier, "inoculation with fluid from cowpox pustules," from vaccine "of cowpox" (in the phrases vaccine matter, vaccine virus) + -ation — more at vaccine

NEW! Time Traveler

First Known Use: 1891

in the meaning defined at sense 1

See Words from the same year

VACCINATION Defined for Kids

vaccination

noun vac·ci·na·tion \ ˌvak-sə-ˈnā-shən \

Definition of vaccination for Students

: the act of vaccinating

Medical Dictionary

vaccination

noun vac·ci·na·tion \ ˌvak-sə-ˈnā-shən \

medical Definition of vaccination

1 : the introduction into humans or domestic animals of microorganisms that have previously been treated to make them harmless for the purpose of inducing the development of immunity