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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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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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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Tuberculosis. Microphotograph of the Mycobacterium tuberculosis, the cause of the disease TB. Tuberculosis. Microphotograph of the Mycobacterium tuberculosis, the cause of the disease TB.
Patients with Parkinson's disease embroyonic stem cell treatment Patients with Parkinson's disease embroyonic stem cell treatment
Autoimmune disease in primates Autoimmune disease in primates
Crohn's Disease Crohn's Disease
Disease-Modifying Antirheumatic Drugs (DMARDs) and Biologic Therapies Disease-Modifying Antirheumatic Drugs (DMARDs) and Biologic Therapies
Video: Physiology of Asthma

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