HIV cannot survive in the air alone, and if bodily fluids with HIV are exposed to air, they lose their infectivity soon after they dry up.
After leaving the body, it is very unstable and can survive for a few minutes or hours, or for a few days if the environment is suitable. However, it is usually exposed with body fluids, such as blood, semen, vaginal secretions, etc. It does not survive in the air alone and will lose its activity soon after the body fluids dry up. In addition, HIV cannot be transmitted through the air, and the concentration of HIV exposed in the air is generally low, so even if it comes into contact with a wound, it usually does not cause disease, so there is no need to panic.
HIV is mainly transmitted through sexual intercourse and blood, but also through mother-to-child transmission. If the skin is intact, daily contact with HIV patients, such as hugging and shaking hands, is usually not contagious.