Figure 1. Characteristics of HIV-1 infected individuals in Guangzhou Hospital of Infectious Diseases in 2009.

The geographical distribution of 462 patients (Guangdong’s residents) was represented by different levels of gray and the parentheses showed cases of patients enrolled in HIV-1 pol/env sequence analysis versus overall patients in this city/county (A). Comparison of characteristics between patients enrolled into the sequence analysis and overall patients, including their age, occupation, risk factors and treatments (B).