The signs of HIV infection are mainly through the corresponding auxiliary tests, that is, after HIV infection, the corresponding antibodies will be produced in the blood circulation, and by checking the HIV antibodies, it is possible to find out that the person is infected with HIV. The signs of HIV infection generally do not include symptoms, because while some people may have fever, rash, swollen lymph nodes or diarrhea after being infected with HIV, others may not have such symptoms, and even if they do, the symptoms may not be exactly the same for each person, so it is not a sign of infection. When symptoms become a marker of HIV infection, it must be that the HIV-infected person goes through a long asymptomatic period of 6-8 years and then the CD4+ T lymphocyte count drops below 200 cells/μL and then they enter the AIDS phase, when some more typical symptoms can appear. For example, recurrent fever that lasts for more than a month can be accompanied by significant wasting, which can reach 10% of body weight; some infections that are less likely to appear in normal people can also appear, such as recurrent herpes zoster, recurrent herpes simplex, and possibly some fungal infections such as thrush; some skin tumors such as Kaposi’s sarcoma and lymphoma may also appear.