Question

What is a 'Vaccine'?

Answer 1

1. A vaccine is a biological preparation that provides active, acquired immunity to a particular disease.
2. Vaccines (BCG, Polio, and MMR) are given in early childhood to protect from other diseases.
3. A vaccine is an antigenic protein derived from pathogens or consists of inactivated or attenuated pathogens or their toxins.
4. Upon introduction into the body, vaccines activate the immune system to elicit an immunological response, which encompasses the generation of antibodies and memory cells.