CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY
Antibiotic drugs. Assortment of oral antibiotic pills, tablets and capsules. They are used to treat bacterial infections or to protect people with weakened immune systems. Some antibiotics only kill certain types of bacteria, while others, known as broad-spectrum antibiotics are used in dealing with a wide range of bacteria.
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