Correct option: D
Explanation: The first vaccine produced by Edward Jenner, was for protection against small pox. The vaccine was developed in 1796. The vaccine lead to global eradication of small pox.
Correct option: D
Explanation: The first vaccine produced by Edward Jenner, was for protection against small pox. The vaccine was developed in 1796. The vaccine lead to global eradication of small pox.