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Your heart beats over 36 million times a year.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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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.
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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%.