Question

what happens if the same disease spread to many people at the same time?why does it become a cause of concern
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Answer 1

Answer:

they will become a disease

Answer 2

Answer:

first let me tell you as a example today a coronavirus spread all over the world this is a matter of concern because if this will spread more there is the chances of of the the population change which will let the population very low

Explanation:

also so there is a chance of of bad quality of food because of population change and many other diseases can be caused by other infected persons