Vaccination - Wikipedia
https://en.wikipedia.org/wiki/Vaccination
Vaccination is the administration of a vaccine to help the immune system develop immunity from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism. In stimulating the body's adaptive immunity, they help prevent sickness from an infectious disease. When a sufficiently large percentage of a population has b…
DA: 86 PA: 9 MOZ Rank: 12
