What is immunity?
What is vaccination?
What is antibodies?
Immunity means being protected from something and being unaffected or not bothered by it. In biology, immunity is the balanced state of organisms having to fight infection, disease, or other unwanted biological invasion, while having adequate tolerance to avoid allergy, and autoimmune diseases.
An antibody is a protective protein produced by the immune system in response to the presence of a foreign substance, called an antigen. Antibodies combine chemically with substances which the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood and help to strengthen immunity.
Vaccination is the administration of antigenic material (a vaccine-usually a killed microbe) to stimulate an individual's immune system to develop adaptive immunity to a pathogen. Unlike most medicines that treat or cure diseases, vaccines prevent them.