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Asthma cases in Americans are about 75% higher today than they were in 1980.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.