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Vaccines prevent between 2.5 and 4 million deaths every year.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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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%.
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Your heart beats over 36 million times a year.