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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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.
In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.