HIV is contagious before the window period, because once infected with HIV, its contagiousness exists. AIDS window period is mainly infected with HIV to the virus antibody can be detected during this period of time, during which the antibody test results are negative, but the patient is still contagious. Window period of AIDS patients, the body’s viral load is relatively high, if the patient at this time and others have unclean sex or share injection supplies, the risk of infection is still high. It is important to take precautionary measures against AIDS in your daily life, avoid sharing injection supplies with others, and avoid unclean sex. If you suspect that you are infected with HIV, please consult a hospital in time to avoid delays.