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Did you know?
There are more bacteria in your mouth than there are people in the world.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.