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Antibiotics - an Apocalypse?

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We all are familiar with Antibiotics as a super drug or lets say a super weapon against Bacteria. So why does this super weapon secretly or unknowingly creating a Super Bacteria leading to an Antibiotic Apocalypse ! . Wait....lets start from beginning. Bacteria  are tiny organisms that are present almost everywhere, even inside our body. Most of them are harmless to us. There are trillions in our body and help us to survive. While some of the bacteria are harmful and can kill you by invading your body. Until past century, millions of people used to die every year due to infections caused by bacteria. Then we discovered Antibiotics, a super drug that can kill majority of bacteria fairly quickly. These antibiotics attack bacteria and disrupts its metabolism so they cant reproduce and eventually killing them and without any major side effects. Super bacteria But, Bacteria are evolving and becoming immune to antibiotics by pure random chance based on Darwin's t