1. vaccination; inoculation; immunization; immunisation
Wikipedia definition
2. VaccinationVaccination is the administration of antigenic material to stimulate the immune system of an individual to develop adaptive immunity to a disease. Vaccines can prevent or ameliorate the effects of infection by many pathogens. The efficacy of vaccination has been widely studied and verified; for example, the influenza vaccine, the HPV vaccine, and the chicken pox vaccine among others. In general, vaccination is considered to be the most effective method of preventing infectious diseases.
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