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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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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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