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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.