CD4 and HIV infectious disease: Among the newly reported HIV infections, 39.0% (318/816) were 18–29 years old, 76.8% (627/816) were male, 61.9% (505/816) were MSM, 46.4% (379/816) were single, 56.6% (462/816) had obtained a high school and above education, and 67.4% (550/816) had a CD4+ T cell count of <500 cells/μL (Table 1).