how does a vaccine work
Answers
Answered by
33
Answer:
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 viruses enter the body, immune cells called lymphocytes respond by producing antibodies, which are protein molecules.
Answered by
1
Answer:
when the vaccine containing dead or alive micro-organisms is introduced into the body of a healthy person orally (by mouth) or by injection, the body of that person responds by producing some substances called 'antibiotics' in its blood. These antibodies kill any 'alive' disease-causing micro-organisms present in the vaccine.
Similar questions