If a duo
test is positive at 7 weeks, it is because
HIV antibody is present. Therefore, an
ELISA antibody test will always be positive in that circumstance. If your duo test is positive, there is no point to repeating an ELISA; you have HIV and that's all there is to it. If so, you need to immediately make an appointment with a doctor or clinic for proper medical care. On the other hand, if your duo test returns negative, it will be 100% proof you do not have HIV.