Question

Q.) if any person have chickenpox why will he/she did not suffer from it again

Answer 1

cause he became resistant to that disease his withe blood cell will recognise the vector and will produce antibodies against it

Answer 2

if any person have chickenpox why will he/she did not suffer from it again because when it happens in any body of person of 1st time there body make able themselves to make antibody against it. After that the can fight against it