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Medicine Facts

There's No Such Thing as a Safe Suntan

Every time you step outdoors, you are bombarded by ultraviolet (UV) radiation from the sun. UV rays cause the number of free radicals in cells to increase. Free radicals are atoms or molecules that ... Continue reading

What Is Sickle Cell Anemia?

Sickle cell anemia is an inherited blood disease. That means you are born with it and it lasts a lifetime. Sickle cell anemia affects the red blood cells. Normal red blood cells are smooth and round ... Continue reading

The sickle-shaped red blood cells tend to get stuck in narrow blood vessels, blocking the flow of blood.

The Incredible Capacity Of The Immune System

By age two, infants in the US can receive up to 20 vaccinations. In view of that, concerns had been raised that too many immunizations could overwhelm an infant's immune system. ... Continue reading

Lymphatic vessels form a circulatory system that operates in close partnership with blood circulation.

What Is Narcolepsy?

Narcolepsy is a sleep disorder than affects about 1 of every 2000 people worldwide. It usually starts in the teens or twenties, but it may begin in childhood. People who have it fall suddenly and ... Continue reading