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Vaccines prevent between 2.5 and 4 million deaths every year.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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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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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.