AIDS can be transmitted through blood, usually through blood and blood products, i.e. a normal person who has imported blood or blood products with the AIDS virus. It can also be transmitted by sharing needles with AIDS patients, for example, by using the same needles for intravenous injections. Of course, there are also some people who perform invasive operations in informal places, such as eyebrow tattooing, earrings, teeth cleaning, etc. If these instruments are not sterilized, the blood or body fluids left on them may cause the next person to become infected if they are used on the next person. Therefore, if you want to avoid HIV infection, you should pay attention to avoid these behaviors, pay attention to protect yourself, and also pay attention to not borrowing or sharing personal items such as toothbrushes, razors, shavers, etc.