Question

The following figure shows the number of susceptibles and infecteds in a population of 4000 through the course of a 60-day ep

How many have had the disease by day ?


_______________ have had the disease by day .

(c) How many have had the disease by the time the epidemic is over?


_______________ have had the disease by the time the epidemic is over.

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Answer #1

(a). It may be observed from the graph ( time-infected) that 700 persons are infected on day 20.

( c). The graph ( time-infected) shows a peak level of 1000. Therefore, 1000 persons have had the disease by the time the epidemic is over.

The remaining part is unclear : How many have had the disease by day ? Which day ?

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