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Did you know?
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.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.