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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.