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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Vaccines prevent between 2.5 and 4 million deaths every year.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Everyone has one nostril that is larger than the other.
Blood and its components.
A typical electric cooling fan assembly showing the radiator and related components.
Serum protein electrophoresis is a technique in which serum components separate into 5 different ...