HIV is a disease that is transmitted through blood and is a chronic infectious disease. Transmission through blood mainly refers to the process of sharing needles with HIV patients, which can cause infection by bringing the blood of HIV patients into healthy people, and also by sharing personal items such as toothbrushes, razors, and shavers with HIV patients. Infections can also be caused by traumatic procedures such as tooth extraction, eyebrow tattooing, tattooing, and teeth cleaning in informal medical settings. Therefore, to avoid HIV infection, you should avoid these behaviors. It is also important to be clean, to have regular sexual partners, and to use condoms during sex as an effective way to prevent HIV infection.