Question

How was vaccine discovered for the first? Name two disease which can be prevented by using vaccines?

Answer 1

Edward jenner was first to develop vaccine for small pox. His discovery was actually his observation in milkman's who were infected with cowpox didn't develop smallpox when they were inoculated with smallpox

Examples of vaccine are-
1) DPT
2) BCG
3) TT

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regards

Answer 2

Answer:

Edward Jenner discovered vaccine for the first time.  

Two diseases which can be prevented by vaccines are tuberculosis and diphtheria.  

:)