Question

Why vaccines are important? how they work?​

Answer 1

Answer:

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 are necessary for curing the disease, specially it is needed for viruses like nowadays corona virus (covid-19) is going on, every country is affected by this disease. to cure this disease vaccine is needed. so it is a very important thing.

HOPE IT HELPS.....