The first cases of AIDS were reported in 1981, and HIV, the retrovirus causing it, was identified in 1983 by Luc Montagnier, Françoise Barré-Sinoussi and Robert Gallo. Tests detecting HIV infection by detecting the presence of HIV antibody were developed. Subsequent tremendous research efforts turned HIV into the best studied virus. Human Herpes Virus 8, the cause of Kaposi's sarcoma which is often seen in AIDS patients, was identified in 1994. Several antiretroviral drugs were developed in the late 1990s, decreasing AIDS mortality dramatically in developed countries. Treatment that exists for HIV includes a multitude of different drugs collectively termed Highly Active Antiretroviral Therapy (HAART). HAART attacks many different aspects of the HIV virus, effectively reducing its effects below the limit of detection. However, when the administration of HAART is discontinued, HIV will bounce back. This is because HAART does not attack latently infected HIV cells, which can reactivate.