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Did you know?
The longest a person has survived after a heart transplant is 24 years.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.