Excerpt
GWEN IFILL (Newshour): The spread of HIV -- that scientists hope will save lives, it all comes down to testing.
Of the 1.2 million Americans who carry the virus which causes AIDS, 20 percent don't even know they have it. After diagnosis, the chance that a patient treated with antiretroviral drug will transmit the disease drops by as much as 96 percent.
The Food and Drug Administration has now approved the first at-home test to detect HIV infection.
To explain how it will work, we're joined by Dr. Anthony Fauci, the director of National Institute of Allergy and Infectious Diseases.
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