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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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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.