ACTUAL STATUS OF KNOWLEDGE, ATTITUDE TO PREVENT HIV / AIDS OF HIGH SCHOOL STUDENTS IN HAI PHONG CITY IN 2013 We proceeded to survey 384 high school students at Thuy Nguyen District and Hai An District regarding knowledge, attitude to prevent the transmission of HIV / AIDS, the result as follows: There is the relation between the correct knowledge about HIV prevention and education level: 12th grade (91.2%), 11th grade (85.1%), 10th grade (77.9%).