Give Reasons for the following : It is said that, “if you had smallpox once, there was no chance of suffering from it again.” Why is it so?

Question

Philoid · Accepted Answer

The reason is that when a person suffers from small pox for the first time the body responds against it and remembers it. So, the next time the virus attacks the body responds with more vigour and eliminates the infection even faster than it was originally eliminated.

Give Reasons for the following :It is said that, “if you had smallpox once, there was no chance of suffering from it again.” Why is it so?

Give Reasons for the following :
It is said that, “if you had smallpox once, there was no chance of suffering from it again.” Why is it so?