Class 12 Biology Human Health Disease Vaccination and immunization

Vaccination and immunization

Vaccination is the process of introduction of vaccines into the body to produce antibodies against the antigens to neutralize the effect of pathogens during actual infection.

Vaccines are the dead or weakened pathogens introduced into the body.

The dead or weakened pathogen leads to the production of antibodies which neutralizes the pathogenic agents during actual infection with the same pathogen.

Immunization is the process where performed antibodies against the toxin are introduced into the body.

Example- performed antibody injection against snake venom.

Using recombinant DNA technology antigenic polypeptides of pathogens in bacteria or yeast.

Example- hepatitis B vaccine produced from yeast.

Fig. vaccination  

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