Question

Why is vaccination considered a prevention of disease

Answer 1

Vaccination is introducing vaccine in the body to develop resistance to a particular disease.

When the dead antigen (in vaccine) enters the body, the immune cells generate a response and this encounter is stored as a memory! Thus, if next time the same antigen enters the body, the immunity system has antibodies to fight against it.

So, the vaccine prepares the body to fight against the antigens by keeping their memory and building antibodies against it. And if that antigen enters the body, the body knows exactly how to control it.

Answer 2

vaccines r responsible for the control of money infectious diseases vaccines contain the same antigens are parts of antigens that cause diseases but the antigens in vaccines are either killed are greatly weakend vaccine antigens r not strong enough to make the immune system produce antibodies against them