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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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Cyanide works by making the human body unable to use oxygen.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.