What Is Vaccination?

The principle of vaccination is the use of pathogens themselves to destroy pathogens. Germs both alive and dead are used as vaccines.
Let us examine which are the important vaccines.
Disease Vaccine
Tuberculosis BCG
Polio OPV
Liver cirrhosis Hepatitis vaccine
Mumps MMR
Tetanus DPT
Diphtheria DPT
Whooping cough DPT