AIDS is a contagious disease and its infectiousness is related to the amount of HIV. Patients who have not been treated with antiretroviral therapy, as well as those who are carriers of AIDS, are generally infectious. For AIDS patients, after active antiviral treatment, the number of HIV will decrease and the infectiousness will also decrease. At present, the main modes of transmission of AIDS are blood transmission, sexual contact transmission and vertical transmission from mother to child. For common lifestyles, such as talking, hugging, shaking hands, working in the same office, riding in a common transportation, etc., these modes are not contagious. Of course, even if you are infected with AIDS, you do not need to worry too much, as most patients with AIDS are in a stable condition after regular treatment.