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1996年拉萨市区十所中等专业学校2719名藏汉族学生进行了乙型肝炎病毒在面抗原（HBsAg）感染率检测。总阳性率11．22％。其中藏族1876太阳性率为14.3％，汉族843太阳性率为4．4%，（有显著差异）。男生1370太阳性率为13．9％，女生1349太阳性率为8．5％（有明著差异）。城镇学生1928太阳性率93％，农牧区学生791人阳性率15．9％（有显著性差异）。
In 1996, 2719 Tibetans and Han nationality students from 10 secondary vocational schools in downtown Lhasa were tested for the HBsAg infection rate. The total positive rate of 11.22%. Among them, the positive rate of Tibetan in 1876 was 14.3% and that of Han 843 was 4.4% (significant difference). The 13.7% rate was 13.9% for boys and 13.4% for girls (a clear difference was noted). The positive rate of 1928 students in urban areas was 93%, and the positive rate of 791 students in rural areas was 15.9% (significant difference).