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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.