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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

A guinea pig being held A guinea pig being held
This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f
In the heat of the Battle of Lake Erie, Perry had to abandon his flagship, the Lawrence, which had b In the heat of the Battle of Lake Erie, Perry had to abandon his flagship, the Lawrence, which had b
One indication of the remarkable transformation of Harlem is town hall meetings. This one was held ... One indication of the remarkable transformation of Harlem is town hall meetings. This one was held ...
In the figure, a 10.0-m long bar is attached by a frictionless hinge to a wall and held ... In the figure, a 10.0-m long bar is attached by a frictionless hinge to a wall and held ...
After elections were held, it was desired to estimate the proportion of voters who regretted ... After elections were held, it was desired to estimate the proportion of voters who regretted ...
Video: Hormones and the menstrual cycle Animation

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