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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.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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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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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.

Globular protein structures are compact and varied. Human serum albumin Globular protein structures are compact and varied. Human serum albumin
Using a microscope to study the human body Using a microscope to study the human body
Human immunodeficiency virus. Human immunodeficiency virus.
Structures of human DNA polymerase g (left) and T7 phage DNA polymerase (right) holoenzymes Structures of human DNA polymerase g (left) and T7 phage DNA polymerase (right) holoenzymes
Geese continued to follow a human around assuming their actual mothers Geese continued to follow a human around assuming their actual mothers
A single cell from an early-stage human embryo A single cell from an early-stage human embryo
Video: Red Blood Cells - Erythropoietin (EPO)

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