Question

EXPLAIN , HOW DOES VACCINE WORK ?​

Answer 1

Answer:

vaccine

A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response. These molecules are called antigens, and they are present on all viruses and bacteria.

Answer 2

Answer:

vaccines contain dead microbes of a particular disease.When vaccine is injected , the human body develops an immunity against that disease and develop memory cells,so that if in future the same disease causing microbe enters the body then the body can fight back and kill them easily.

Explanation:

hope it helps......