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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
The longest a person has survived after a heart transplant is 24 years.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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.