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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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%.