According to WHO, Immunization is the process whereby a person is made immune or resistant to an infectious disease, typically by the administration of a vaccine, which stimulates the body ’s own immune system, to protect the person against subsequent infection or disease.
WHAT ARE THE TYPES OF VACCINES?
Types of Vaccines are typically based on fundamental information about the microbe, such as how it infects cells and how the immune system responds to it, as well as practical considerations, such as regions of the world where the vaccine would be used.
The following are some of the types of vaccines:
Live, attenuated vaccines
Recombinant vector vaccines
HOW VACCINES PREVENT DISEASES?
Vaccines reduce the risk of infection by working with the body’s natural defenses to help it safely develop immunity to disease. When germs (bacteria or viruses), invade the body, they attack and multiply. This invasion is called an infection which causes disease. The antibodies from immune system fight and kills the germs to protect the body from disease.