Doctors have fought infections with penicillin for over 50 years. Recently, penicillin has not worked as well as before. Which of the following explanations can account for this observation?

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asked Jul 25, 2018 95.7k views

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Doctors have fought infections with penicillin for over 50 years. Recently, penicillin has not worked as well as before. Which of the following explanations can account for this observation?

Biology
high-school

Jhonatan Sabadi asked

by Jhonatan Sabadi

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Over the years illnesses have been harder to treat because they mutate and start to develop an immunity to drugs.

Lhk answered Jul 30, 2018

by Lhk

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