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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.