After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.
Examples of animals with external gills.
The life cycle of Plagiorhynchus cylindraceus, an intestinal parasite of birds.