After HIV infection, except for the early acute infection such as pneumonia and brain infection. From the time of infection to 6 months, there will be a certain period of asymptomatic period. This asymptomatic period is called the latent period of AIDS. An infected person may not have any clinical symptoms during the incubation period, but the incubation period is not a resting period, let alone a safe period, as the virus continues to multiply and has a strong destructive effect. A person infected with HIV during the incubation period has HIV in his or her blood, semen, vaginal secretions, breast milk, and organs, and is infectious. The best way to get tested for HIV is, of course, to go to a hospital. However, if you do not want to go to the hospital for various reasons, you can also buy HIV test strips for self-testing. At present, there are two main types of self-testing reagents, one is to test through blood; another way is to test through saliva, also known as oral mucosal exudate testing method. Both of these methods are convenient and easy to obtain self-testing reagents. The main method of HIV testing in hospitals is to draw blood for antibody testing, which can be done in major hospitals or CDC or some private institutions. The cost is also very low. In addition, there are immune function tests. Autoimmune function testing is the most advanced testing technology in the world. The T-cell proliferation and enzyme-linked immunospot assays are used to measure the number of active immune cells and the ability to kill viruses, so as to determine the strength of the patient’s own immune function.