: Most common rapid tests detect antibodies produced by the immune system in response to HIV. These have a window period of 3 to 12 weeks post-exposure.
: Modern rapid tests generally boast sensitivity and specificity rates above 99% . However, a "reactive" (preliminary positive) result must be confirmed by a professional laboratory test for a definitive diagnosis. Purchasing Options
You can buy rapid HIV tests from various reputable retailers and manufacturers: Rapid Test - Clinical Info HIV.gov
A rapid HIV antibody test can detect HIV antibodies in blood or oral fluid in less than 30 minutes. There is also a rapid antigen/ Clinical Info HIV.gov Understanding Rapid HIV Tests: How Accurate Are They?