<prompt> For diagnosis of HIV infection in asymptomatic, minimum number of tests required isare:1234  <response>: Screening of HIV: Strategy 1: one out of three screening tests are used; Done for screening every blood unit before transfusion. Strategy II: Two out of three screening tests are used; Done for screening person who is symptomatic with any one of AIDS defining illness. Strategy III: All three screening tests are used; Done for screening person who is asymptomatic. 