Question

how does a vaccine Works? explain​

Answer 1

Answer:

When you press the it the volume decreases and the medicine is injected inside the body.

Hope this helps you out with your work.

Answer 2

Vaccine are like a training course for immune system.they prepare the body to fight against 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.