KVPY 2020-21 SB SX Exam Previous Papers

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Question : 75 of 120

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Assume a population that has reached herd immunity for an infectious disease. If an infected individual is introduced to this population, which of the following is most likely to occur?

The infection will spread exponentially across the population.
The infection will spread linearly across the population.
A few individuals may get infected, but the infection will not spread across the population.
No other individual will be infected by the disease.

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