Question

What is vaccine? How does it works?

Answer 1

Vaccines are like a training course for the immune system. They prepare the body to fight disease without exposing it to disease symptoms. When foreign invaders such as bacteria or virusesenter the body, immune cells called lymphocytes respond by producingantibodies, which are protein molecules.

Answer 2

in our childhood we have given a vaccine which is made up of the dead microorganisms when it enter in the body then intibodies present in the body they eat dead microorganisms and they became active in our future when we are ill then protect us from the disease like TB, Cholera