Mexico City lifts air pollution alert

Mexican officials lifted a four-day air pollution alert in the nation's densely-populated capital after ozone levels dropped to acceptable levels.

The cost of Chinese air pollution

China's fabled air pollution assaulted Linda Greer, J76, the moment she arrived in Beijing in 2008, on her first trip there for the Natural Resources Defense Council (NRDC). "I literally could not see down the block," she ...

Researchers measure cavitation noise in trees

(Phys.org) —A team of researchers from Grenoble University in France has found that under experimental conditions, roughly half of the noise created by drying wood is due to cavitation. The team made this discovery while ...

Buzz builds for honey treatments

Researchers are racing against the clock to find a viable alternative to traditional antibiotics, as bacteria continues to build resistance against new drugs at a frightening rate.

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Disease

A disease is an abnormal condition affecting the body of an organism. It is often construed to be a medical condition associated with specific symptoms and signs. It may be caused by external factors, such as infectious disease, or it may be caused by internal dysfunctions, such as autoimmune diseases. In humans, "disease" is often used more broadly to refer to any condition that causes pain, dysfunction, distress, social problems, and/or death to the person afflicted, or similar problems for those in contact with the person. In this broader sense, it sometimes includes injuries, disabilities, disorders, syndromes, infections, isolated symptoms, deviant behaviors, and atypical variations of structure and function, while in other contexts and for other purposes these may be considered distinguishable categories. Diseases usually affect people not only physically, but also emotionally, as contracting and living with many diseases can alter one's perspective on life, and their personality.

Death due to disease is called death by natural causes. There are four main types of disease: pathogenic disease, deficiency disease, hereditary disease, and physiological disease.

Diseases can also be classified as communicable and non-communicable disease.

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