Disability-adjusted life year for measles per 100,000 inhabitants in 2004. |alt=|350x350px Measles is extremely contagious, but surviving the infection results in lifelong immunity, so its continued circulation in a community depends on the generation of susceptible hosts by birth of children. In communities which generate insufficient new hosts the disease will die out. This concept was first recognized by Bartlett in 1957, who referred to the minimum number supporting measles as the critical community size (CCS). Analysis of outbreaks in island communities suggested that  the CCS for measles is c. 250,000.
 |alt=|350x350px Measles is extremely contagious, but surviving the infection results in lifelong immunity, <ref> Cite web URL |title=Archived copy |access-date=2017-04-19 URL |archive-date=2015-02-07 |url-stt the CCS for measles is c. 250,000.
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Disability-adjusted life year for measles per 100,000 inhabitants in 2004.
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so its continued circulation in a community depends on the generation of susceptible hosts by birth of children. In communities which generate insufficient new hosts the disease will die out. This concept was first recognized by Bartlett in 1957, who referred to the minimum number supporting measles as the critical community size (CCS). Analysis of outbreaks in island communities suggested that
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Cite web URL |title=Archived copy |access-date=2017-04-19 URL |archive-date=2015-02-07 |url-stt