The critical community size (CCS) is the minimum size of a closed population within which a human-to-human, non-zoonotic pathogen can persist indefinitely. [1]
When the size of the closed population falls below the critical community size level, the low density of infected hosts causes extinction of the pathogen. [2] This epidemiologic phenomenon was first identified during measles outbreaks in the 1950s. [1]
The critical community size depends on:[ citation needed]
The critical community size (CCS) is the minimum size of a closed population within which a human-to-human, non-zoonotic pathogen can persist indefinitely. [1]
When the size of the closed population falls below the critical community size level, the low density of infected hosts causes extinction of the pathogen. [2] This epidemiologic phenomenon was first identified during measles outbreaks in the 1950s. [1]
The critical community size depends on:[ citation needed]