What

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What is gangrene? 

Gangrene is an infection that has not been treated for a long time. There are many types of penicillin there are penicillin G or (benzoyl penicillin), phenoxymethylpenicillin or (penicillin V) There are many more but if you want to here more then come to me after class.

What I'm studying is penicillin.

Penicillin in WWII was used mostly for the soldiers in the war who had been shot or got gangrene.