Hello As you are curious about AIDS or popularly known as HIV infection . You didn t want a confirmatory test for HIV infection . Only way is that if someone develop HIV , there develop symptoms : Approximately 50-705 of infected individuals experience an acute syndrome following primary infection. The acute syndrome follows infection by 3-6 weeks . Symptoms are , fever, pharyngitis , headache /retro-orbital pain ( behind eyes), lymphadenopathy, letharhy/malaise,arthralgias /myalgias, anorexia /loss of weight , erythematous rashes , mucocutaneous ulceration. Antibodies begin to appear within 2 weeks of initial infection ( contract with HIV infected patient ). Chronic cases develop following symptoms : Major signs 1 Weight loss ================1 month 2 Chronic diarrhea =============1 month 3 Prolonged fever===============1 month Minor signs 1 Persistent cough for one month 2 Generalized pruritic dermatitis 3 Recurrent Herpes Zoster 4 Oropharyngeal candiasis 5 Chronic progressive and disseminated Herpes simplex infection 6 Generalized lymphadenopathy. So I mentioned in detail for your information.