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The average adult has about 21 square feet of skin.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.