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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Major structures of the human brain. Major structures of the human brain.
brain brain
Blood-brain barrier Blood-brain barrier
The meninges of the brain and spinal cord. The meninges of the brain and spinal cord.
The Z lens, which was developed by Zaidel to study functional asymmetry in split-brain patients. It ... The Z lens, which was developed by Zaidel to study functional asymmetry in split-brain patients. It ...
Pathway by which the nervous system controls skeletal muscle contraction Pathway by which the nervous system controls skeletal muscle contraction
Video: Contraction cycle of a sarcomere

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