What is in a vaccination?

Answer:
Vaccination is the administration of antigenic material (the vaccine) to produce immunity to a disease. Vaccines can prevent or lessen the effects of infection by many different viruses and bacteria. The material administered can either be live but weakened forms of pathogens (bacteriaor viruses), killed or inactivated forms of these pathogens, or purified material such as proteins.
First answer by Cunningcam. Last edit by LubaP. Contributor trust: 150 [recommend contributor recommended]. Question popularity: 2 [recommend question].