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herd immunity

noun
1.
the immunity that occurs when an entire group of animals or people become immune to a particular infection, as with universal vaccination.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for herd immunity
  • If herd immunity is the goal, then clearly we'd use this vaccine as much as possible.
  • Large-scale vaccination of the population, called herd immunity, also provides an important defense against infectious disease.
  • And now vaccine resistance is spreading among parents who want to free ride on the herd immunity of others.
  • Being vaccinated against a disease protects everyone else through herd immunity.
  • Actually it's the un-vaccinated people who should be thanking the vaccinated, it's called herd immunity.
  • herd immunity is what helps out those who cannot be vaccinated or whose vaccination doesn't work, for whatever reason.
  • herd immunity works when enough of the herd is immunised.
  • Vaccinations are not primarily individual protection, they are used to great herd immunity.
herd immunity in Medicine

herd immunity n.

  1. Resistance to the spread of infectious disease in a group because susceptible members are few, making transmission from an infected member unlikely.

  2. The immunologic status of a population, determined by the ratio of resistant to susceptible members and their distribution.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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