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Beginning of Paper
For about 50 years, antibiotics have been the answer to many bacterial infections. Antibiotics are chemical substances that are secreted by living things. Doctors prescribed these medicines to cure many diseases. During World War II, it treated one of the biggest killers during wartime - infected wounds. It was the beginning of the antib ....

Middle of Paper
.... was growing, were some clear spots. He realized that something had killed the bacteria in these clear spots, which ended up to be a fungus growth. He then discovered that inside this mold was a substance that killed bacteria. It was the antibiotic, penicillin. Penicillin became the most powerful germ-killer known at that time. Antibiotics kill disease-causing bacteria by interfering with their processes. Penicillin kills bacteria by attaching to their cell walls. Then it destroys part of the wall. The cell wall breaks apart and bacteria dies. After four years, w ....

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