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Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Spectral sensitivity of the human cone opsins Spectral sensitivity of the human cone opsins
Human body in anatomical ¬position Human body in anatomical ¬position
Opener A human X chromosome highlighted using fluorescence in situ hybridization Opener A human X chromosome highlighted using fluorescence in situ hybridization
Standardized human chromosome banding patterns Standardized human chromosome banding patterns
A Short List of Human X-Linked Recessive and X-Linked Dominant Traitsa A Short List of Human X-Linked Recessive and X-Linked Dominant Traitsa
Physical distance versus recombination distance on human male and female chromosome 19 Physical distance versus recombination distance on human male and female chromosome 19
Video: Muscle Twitch and Muscle Tension - Motor unit size and force

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