July 1, 2019, Medscape 

Fewer than 40% of people in the United States have ever been tested for HIV, according to a report from the Centers for Disease Control and Prevention published June 27 in Morbidity and Mortality Weekly Report.

National HIV Testing Day, on June 27, acknowledges the vital role of testing in preventing, detecting, and treating HIV infection. Early diagnosis is critical to controlling transmission. Those who test negative but are at elevated risk can employ preexposure prophylaxis.

Since 2006, CDC has recommended universal screening for HIV infection at least once in a healthcare setting for people aged 13 to 64 years and at least annual rescreening of individuals at increased risk. 

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