Question

If you had small pox once, there is no chance of suffering from it again. How?​

Answer 1

Explanation:

if a person has small pox once then our immune system develop Memory T-cells so that if the samekind of pathogen enters our body again then it can kill them quickly..so if pathogen of small pox enters our body again ,our immune system recognises the pathogen and kills it

Answer 2

Immunity

• Our immune system, in the first encounter of a certain pathogen, remembers it.
• In the second encounter, the immune system tries to eliminate the pathogen. It gives a greater vigour this time.
• Thus, there is a higher possibility of no suffering from the disease, i.e., small pox for the second time.