NURSING ANM AND GNM

Detailed explanation-1: -The basis for vaccination began in 1796 when the English doctor Edward Jenner noticed that milkmaids who had gotten cowpox were protected from smallpox. Jenner also knew about variolation and guessed that exposure to cowpox could be used to protect against smallpox.

Detailed explanation-2: -Before smallpox was eradicated, it was a serious infectious disease caused by the variola virus. It was contagious-meaning, it spread from one person to another. People who had smallpox had a fever and a distinctive, progressive skin rash.