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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Everyone has one nostril that is larger than the other.
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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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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.