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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.