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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Carnivorous plants, such as this pitcher plant (Sarracenia purpurea) are commonly found in bog habit Carnivorous plants, such as this pitcher plant (Sarracenia purpurea) are commonly found in bog habit
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Video: Protein digestion - stomach & small intestine

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