It is a process of introduction of vaccines into the body to produce antibody against the antigens to neutralize the effect of the pathogens during actual infection.
Vaccines are the dead or weakened pathogens introduce into the body.
The dead or weakened pathogens leads to production of antibodies which neutralized the pathogenic agents during actual infection with some pathogens
TYPE OF VACCINES
1- Atenuated whole-agents vaccines - Here the living attenuated microbes are used .
Example - sabin polio vaccine ,vaccine for measles ,mumps and rubella and typhoid vaccines
2- Toxoids - These are inactivated toxins which acts as a vaccines against diseases like tetanus and diphtheria .
3- Inactivated whole agent vaccines - Inactivated vaccines are use against disease like cholera ,rabies, pneumonia etc .
4- Subunit vaccines - These are antigenic fragments of microbes that stimulate immune responsible .
5- Nucleic acid vaccines - DNA and RNA acts as a vaccines .
6- Conjugated vaccines - polysaccharides along with proteins together form conjugated vaccines , which is effective against haemophilia influenza
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