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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.