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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.
Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
There are 20 feet of blood vessels in each square inch of human skin.