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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.