Question

What is vaccine?How does it work? easy answer
​

Answer 1

Answer:

A vaccine is a type of medicine that trains the body’s immune system so that it can fight a disease it has not come into contact with before. Vaccines are designed to prevent disease, rather than treat a disease once you have caught it.

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.

Answer 2

Answer:

A vaccine is a biological preparation that provide active acquired immunity to a particular disease.

Explanation:

A vaccine typically contains an agent that resembles a disease- causing microorganisms and is often made from weakened or killed forms of the microbes, its toxins, or one of its surface proteins.