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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.