Why was edward Jenner so important in the would of microbes?

Edward Jenner is considered a pioneer in immunology for developing the first successful smallpox vaccine in 1796. His work demonstrated that exposure to a milder disease, cowpox, could provide immunity against the more deadly smallpox. This groundbreaking approach laid the foundation for modern vaccination practices, ultimately transforming public health and leading to the eventual eradication of smallpox. Jenner's contributions significantly advanced our understanding of how microbes can be managed through immunization.