API stands for Application Programming Interface, i.e. API is the way for an application to interact with certain system/application/library/etc. For example, there are API's for OS (WinAPI), API's for other applications (like databases) and for specific libraries (for example, image processing), etc.
Acute HIV infection: The first stage of HIV, known as the primary or acute infection, may cause symptoms of fever and skin rash. This is because the virus is multiplying rapidly in the body and infecting immune cells. This phase generally lasts several weeks.
HIV rash can occur due to the adverse effect of taking medications for aids. For some people the skin would be peeling on the affected parts with sores formation on the oral cavity and genitals. Other common symptoms of HIV infection are fever, loss of weight, poor concentration, temporary loss of vision and diarrhea. It can also cause joint pain, muscle pain, swollen glands, fatigue and unexplained fever.