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Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
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There are more sensory neurons in the tongue than in any other part of the body.
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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.