CD4 and HIV infectious disease: In 2012, patients with first positive HIV test had a higher median age (39.8 years) compared with that of the comparable group of patients in 2008 (37.9 years old) (P < 0.05); HIV infection from homosexual transmission occurred more frequently in patients in 2012 (36.4 %) compared with in 2008 (18.8 %) (P < 0.001); However, baseline CD4 T-cell count counts were similar in 2008 and 2012 (median: 319 and 328 cell/μl, respectively; P > 0.05); The rate of HAART treatment during the first year of diagnosed with HIV was significantly higher (27.5 %) in 2012 than in 2008 (3.1 %) (P < 0.001).