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herd immunity

 - 3 dictionary results

herd immunity

 
Use herd immunity in a Sentence
–noun
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. 2009.
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Medical Dictionary

Main Entry: herd immunity
Pronunciation: 'h&rd-
Function: noun
: a reduction in the probability of infection that is held to apply to susceptible membersof a population in which a significant proportion of the individuals are immune because the chance of coming in contact with an infected individual is less
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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