 
<translate> Ihe dị mkpa ga-enyere anyị aka ịza ajụjụ a bụ: Ọ bụ Edward Jenner malitere ịgba ọgwụ mgbochi kịtịkpa n'afọ 1796. Ya mere, azịza ya bụ Edward Jenner. <eng> The important part for answering this question is: Smallpox vaccine, the first successful vaccine to be developed, was introduced by Edward Jenner in 1796. So, the answer is Edward Jenner. 