Question

what is vaccination? discuss the principal of vaccination

Answer 1

Vaccination is the administration of antigenic material (a vaccine) to stimulate an individual's immune system to develop adaptive immunity to a pathogen. Vaccines can prevent or ameliorate infectious disease. When a sufficiently large percentage of a population has been vaccinated, herd immunity results.

Answer 2

Antibody from any source (e.g., transplacental, transfusion) can interfere with replication of the vaccineorganism and lead to poor response or no response to the vaccine (also known as vaccine failure). Live attenuated vaccines are fragile and can be damaged or destroyed by heat and light.