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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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.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Question
How wide must a narrow slit be if the first diffraction minimum occurs at 12 with laser light ...