AIDS is caused by infection of the body with the Human Defective Virus (HIV). The Dried Blood Spot Test is an HIV antibody/nucleic acid test that provides an initial indication of whether you are infected with HIV. The dried blood spot test is a method of diagnosing HIV infection by placing a drop of fingertip blood on a piece of filter paper to prepare a dried blood spot, and then testing the dried blood spot sample in a laboratory for HIV antibodies and a test for HIV nucleic acid (DNA). In the process of HIV infection, the test can determine whether there is an early infection. Therefore, dried blood spot testing has important clinical and public health implications as it is effective in screening for HIV infection in people at very high risk of infection and in giving early intervention and treatment to infected people. However, the dried blood spot test is currently limited to specialized HIV testing laboratories and other institutions, and there are no relevant commercialized products.