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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.