Hans Zinsser was an american physician, bacteriologist, and author,he isolated the Typhus Bacterium and developed a vaccine against the Typhoid Fever or Typhoid disease…
Hello I am Ajit from Kolkata,the writer of this Biographical Blog. Here you can find all biography pdf in every fields… It covers almost every country’s great personality… You can download also from here… This website is education purpose…Here you can find great personalities from various fields, like artist entrepreneours, leaders, poets, politicians, philantropists, scientists, saints,singers,socialist etc etc etc…
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