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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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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Translational regulation of ferritin mRNA by the iron regulatory protein (IRP) Translational regulation of ferritin mRNA by the iron regulatory protein (IRP)
iron iron
Animal carcasses like this South African wildebeest provide important nutrition for both hunters and Animal carcasses like this South African wildebeest provide important nutrition for both hunters and
The MyPlate icon reinforces important concepts of meal planning The MyPlate icon reinforces important concepts of meal planning
In a metallurgical process the mineral pyrite, FeS2, is roasted in air: FeS2 + O2 Fe2O3 + ... In a metallurgical process the mineral pyrite, FeS2, is roasted in air: FeS2 + O2 Fe2O3 + ...
Mechanisms of action of vitamin E, one of the most important lipid-soluble antioxidants Mechanisms of action of vitamin E, one of the most important lipid-soluble antioxidants
Video: Negative Feedback Regulation of Blood Pressure

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