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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.