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Community immunity is having a large percentage of the population vaccinated in order to prevent the spread of certain infectious diseases.  Even individuals not vaccinated (such as newborns and those with chronic illnesses) are offered some protection because the disease has little opportunity to spread within the community. This is also known as [[herd immunity]].

Community immunity is having a large percentage of the population vaccinated in order to prevent the spread of certain infectious diseases.  Even individuals not vaccinated (such as newborns and those with chronic illnesses) are offered some protection because the disease has little opportunity to spread within the community. This is also known as [[herd immunity]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#c</ref>