why does why does a person who has suffered words small Fox cannot Suffer with it again
Answers
Answer:
beacuse after that we take vaccine because some people are not taking vaccine befor it then after that the it is helps to protect us
Answer:
as the small pox is not seen now a days, i can expalin it with chickengunia
Explanation:
In our immune sysytem there are T-cells and B-cells
this B-cells will diffrentiate into 'effector' plasma cells and 'long lived' memory cells
This differentiation occurs after the diesaease is infected
in the time of diffrentiation of B-cells the infection is increased
Now the effector cells will attack the infecting organism present in the body
and the memory cells will be as the memory of that infecting organism
If that same organism enters the body this memory cells will activate and instanly kill that organism
So,the chickengunia in a preson is not seen again in his lifetime.