Who developed the first successful vaccine, protecting against smallpox?

Explanation

Edward Jenner, an English physician, developed the first successful vaccine in 1796 by using material from cowpox to protect against the deadly disease smallpox, laying the foundation for the field of immunology. His work eventually led to smallpox being declared eradicated worldwide by the World Health Organization in 1980, the only human disease eradicated through vaccination so far. The term vaccine itself comes from vacca, the Latin word for cow, referencing Jenner’s use of cowpox. Explore more Everyday Science MCQs on mcqstutor to keep practicing.