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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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%.