There is no such thing as symptoms that must be present at 3 weeks of AIDS. In the early stage of the virus infection, there are no specific symptoms, which need to be diagnosed through antibody testing. HIV infection for three weeks for the early infection, some patients may appear fever, fatigue, lymph node swelling and other minor symptoms, and can subside on their own, and does not have the specificity, and most people can also be manifested asymptomatic. Therefore, AIDS cannot be diagnosed by symptoms in the early stages of the disease. Most of the infected people can find out the HIV antibody at 3 weeks, and the high-risk groups need to be re-tested after 3 months or 6 months if they are negative. Therefore, it is not accurate to diagnose HIV infection through symptomatology. If high-risk behaviors are present, it is recommended that HIV antibody testing be done at the CDC and retested if necessary as prescribed by your doctor.