HIV-positive babies rest in an orphanage in Nairobi, Kenya. Treatment right after birth may make it possible for HIV-positive newborns to fight off the virus. Brent Stirton/Getty Images hide caption

itoggle caption Brent Stirton/Getty Images

David Lozano (left) and Kevin Kreinbring stand in front of a painting created by Lozano. The couple says they get tested for HIV together every six months. Courtesy of David Lozano hide caption

itoggle caption Courtesy of David Lozano

A doctor takes an HIV test from an athlete during the 18th National Sports Festival in Lagos, Nigeria, last December. Sunday Alamba/AP hide caption

itoggle caption Sunday Alamba/AP

Latinos and African-Americans are more active on social media. Could that help promote HIV testing among minorities? Brendan Smialowski/Getty Images hide caption

itoggle caption Brendan Smialowski/Getty Images

A prostitute in Johannesburg waits for a client on a street corner. An estimated two-thirds of sex workers in South Africa are HIV positive. Yoav Lemmer/AFP/Getty Images hide caption

itoggle caption Yoav Lemmer/AFP/Getty Images

A nurse takes a blood sample from Nkosi Minenhle, 15, in a mobile clinic set up to test students for HIV at Madwaleni High School in KwaZulu Natal, South Africa. Stephane de Sakutin/AFP/Getty Images hide caption

itoggle caption Stephane de Sakutin/AFP/Getty Images

A woman waits to get AIDS drugs on April 8 at a clinic in Ga-Rankuwa, South Africa, about 55 miles north of Johannesburg. New WHO guidelines say patients should start HIV treatment much earlier, before they become extremely sick. Stephane de Sakutin/AFP/Getty Images hide caption

itoggle caption Stephane de Sakutin/AFP/Getty Images

Women in Bangalore, India, make red ribbons at an HIV support center in November 2012. Manjunath Kiran/AFP/Getty Images hide caption

itoggle caption Manjunath Kiran/AFP/Getty Images

The Centers for Disease Control and Prevention says doctors should prescribe Truvada, a once-a-day pill for HIV, to help prevent infections in IV drug users. Jeff Chiu/AP hide caption

itoggle caption Jeff Chiu/AP

An electron micrograph of HIV particles infecting a human T cell. French researchers say they've found 14 patients with so little HIV virus in their blood that the patients have gone into "long-term remission." National Institute of Allergy and Infectious Diseases hide caption

itoggle caption National Institute of Allergy and Infectious Diseases