KNOWLEDGE AND ATTITUDE OF HIV / AIDS PATIENTS ABOUT ANTIVIRAL TREATMENT IN SONG MA DISTRICT, SON LA PROVINCE IN 2014 After conducting a study of knowledge and attitude of 126 patients treated by ARV as outpatients at clinic of Song Ma district general hospital, we had the result which demonstrated that: 100% of patients knew that the benefit of ARV was to prevent the proliferation of the virus and to reduce the number of it.