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The human body produces and destroys 15 million blood cells every second.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.