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?
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are 60,000 miles of blood vessels in every adult human.
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People about to have surgery must tell their health care providers about all supplements they take.
Amazing NASA Pictures Collection
World population density
Changes in the Age Structure of the Population, 1950–2050