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Assume that someone who has a disease and survives is subsequently immune to that disease. All...

Assume that someone who has a disease and survives is subsequently immune to that disease. All of the following will reduce R0 EXCEPT: A. An increase in the proportion of individuals in the population who have had the disease B. A reduction in the number of people that each infected person comes in contact with C. An increase in the proportion of people who survive vs. die following infection D. A reduction in the time for which the person is contagious (e.g., following effective drug treatment)

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C. An increase in the proportion of people who survive vs. die following infection

Since the proportion of people who die from it does not affect the number of people infected per infected individual, an increase in the proportion of suvivors does not have any effect on R0.

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