Question

How does inoculation reduce the occurrence of disease?

Answer 1

Inoculation exposes a person to a contagious disease in a very small amount. Their immune system attacks the disease, and learns to recognize it if it is ever encountered again. Later, if they are exposed to the actual disease, their body fights it off without becoming very ill. It often prevents them from spreading it to someone else as well. That is how inoculation reduces the occurrence of disease

Answer 2

The Bottom Line Vaccines prevent diseases that can be dangerous, or even deadly. Vaccines greatly reduce the risk of infection by working with the body’s natural defenses to safely develop immunity to disease. This fact sheet explains how the body fights infection and how vaccines work to protect people by producing immunity.