Who invented vaccine?


Who knows who invented vaccine please write your answer in the comment section below. If you also know when was vaccine invented be free to write it too. If you want to read my already written articles about inventions and don’t want to guess new ones then you need to look in a different category then “Guess who and when” on my website. Let’s get smarter!

who invented vaccine

who invented vaccine


when was vaccine invented

when was vaccine invented

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