This virus is 80-100 nm in diameter. It also infects macrophages. This virus will attack your immune system, slowly and steadily. According to the CDC, there have been 79 people infected with HIV-2 in the United States since 1987. Proper use of condoms and other safe-sex practices, screening of the blood supply, and not sharing needles will all help protect you.
Nucleoside analogs are effective, as are protease inhibitors.
However, it often goes unnoticed because it attacks far less frequently.