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Author Question: What does LD50 refer too and what is the importance of LD50 in terms of pesticide toxicity? What ... (Read 38 times) |
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The horizontal fraction bar was introduced by the Arabs.
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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.
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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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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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There are approximately 3 million unintended pregnancies in the United States each year.