Table 2. Spatiotemporal distribution of HIV-1 subtypes, CRFs, and URFs across four time periods.
| Region/Years | HIV-1 CRFs | URFs |
Total
recombinants |
HIV-1 subtypes | |||||||
| 01_AE | 07_BC | 08_BC | 55_01B | Other | Total CRFs | B | Other | Total subtypes | |||
| Note: The Northeast region comprises HLJ, JL, and LN; North includes NM, BJ, TJ, HE, and SX; East encompasses SH, JS, ZJ, AH, FJ, JX, and SD; South consists of GD, GX, and HI; Central includes HA, HB, and HN; Northwest comprises SN, GS, QH, NX, and XJ; Southwest includes CQ, SC, GZ, YN, and XZ. Data are presented as proportions of total reported HIV infections within each region and time period. Abbreviation: HIJ=Heilongjiang; JL=Jilin; LN=Liaoning; NM=Neimenggu; BJ=Beijing; TJ=Tianjin; HE=Hebei; SX=Shanxi; SH=Shanghai; JS=Jiangsu; ZJ=Zhejiang; AH=Anhui; FJ=Fujian; JX=Jiangxi; SD=Shandong; GD=Guangdong; GX=Guangxi; HI=Hainan; HA=Henan; HB=hubei; HE=Hunan; SN=Shannxi; GS=Gansu; QH=Qinghai; NX=Ningxia; XJ=Xinjiang; CQ=Chongqing; SC=Sichuan; GZ=Guizhou; YN=Yunnan; XZ=Xizang. | |||||||||||
| China | |||||||||||
| 2004–2009 (%) | 31.0 | 24.8 | 10.0 | 0.6 | 5.0 | 71.4 | 1.7 | 73.1 | 24.7 | 2.2 | 26.9 |
| 2010–2014 (%) | 41.1 | 35.9 | 6.0 | 2.1 | 5.6 | 90.7 | 0.9 | 91.6 | 7.2 | 1.3 | 8.4 |
| 2015–2019 (%) | 31.4 | 46.1 | 8.4 | 3.0 | 4.4 | 93.4 | 0.9 | 94.3 | 5.0 | 0.7 | 5.7 |
| 2020–2023 (%) | 27.6 | 42.2 | 11.9 | 3.2 | 9.0 | 94.0 | 1.8 | 95.9 | 3.5 | 0.6 | 4.1 |
| Central | |||||||||||
| 2004–2009 (%) | 12.8 | 1.8 | 0.3 | 0.1 | 0.4 | 15.4 | 0.1 | 15.5 | 84.3 | 0.2 | 84.5 |
| 2010–2014 (%) | 44.1 | 20.8 | 1.9 | 4.4 | 3.1 | 74.4 | 0.2 | 74.6 | 25.1 | 0.3 | 25.4 |
| 2015–2019 (%) | 37.1 | 30.0 | 4.4 | 5.7 | 3.2 | 80.3 | 1.1 | 81.4 | 18.1 | 0.5 | 18.6 |
| 2020–2023 (%) | 30.1 | 37.7 | 5.9 | 3.7 | 8.3 | 85.8 | 1.8 | 87.5 | 11.3 | 1.2 | 12.5 |
| East | |||||||||||
| 2004–2009 (%) | 38.5 | 16.5 | 3.4 | 0.0 | 2.6 | 61.0 | 0.2 | 61.2 | 36.8 | 2.0 | 38.8 |
| 2010–2014 (%) | 56.0 | 25.7 | 1.7 | 1.4 | 5.6 | 90.2 | 0.2 | 90.4 | 7.1 | 2.4 | 9.6 |
| 2015–2019 (%) | 40.1 | 35.0 | 5.1 | 3.6 | 6.4 | 90.2 | 1.1 | 91.3 | 7.9 | 0.8 | 8.7 |
| 2020–2023 (%) | 30.4 | 40.1 | 6.3 | 2.8 | 11.8 | 91.5 | 2.8 | 94.3 | 4.4 | 1.3 | 5.7 |
| North | |||||||||||
| 2004–2009 (%) | 35.1 | 9.1 | 1.6 | 0.6 | 0.8 | 47.2 | 0.1 | 47.3 | 52.3 | 0.4 | 52.7 |
| 2010–2014 (%) | 52.1 | 21.7 | 1.1 | 1.1 | 4.4 | 80.3 | 0.3 | 80.6 | 18.7 | 0.7 | 19.4 |
| 2015–2019 (%) | 52.3 | 29.7 | 0.9 | 2.4 | 6.2 | 91.4 | 0.8 | 92.2 | 7.5 | 0.3 | 7.8 |
| 2020–2023 (%) | 37.3 | 38.7 | 1.0 | 2.2 | 13.1 | 92.3 | 2.7 | 95.0 | 4.9 | 0.0 | 5.0 |
| Northeast | |||||||||||
| 2004–2009 (%) | 36.4 | 2.1 | 5.3 | 0.3 | 8.2 | 52.2 | 0.0 | 52.2 | 47.2 | 0.6 | 47.8 |
| 2010–2014 (%) | 71.6 | 9.3 | 0.0 | 0.8 | 5.9 | 87.6 | 0.9 | 88.5 | 9.4 | 2.1 | 11.5 |
| 2015–2019 (%) | 71.5 | 16.9 | 0.5 | 0.8 | 4.1 | 93.8 | 0.3 | 94.1 | 5.5 | 0.4 | 5.9 |
| 2020–2023 (%) | 48.4 | 29.7 | 0.8 | 1.5 | 10.3 | 90.8 | 2.7 | 93.4 | 5.6 | 1.0 | 6.6 |
| Northwest | |||||||||||
| 2004–2009 (%) | 0.9 | 93.6 | 0.1 | 0.0 | 0.0 | 94.6 | 0.0 | 94.6 | 5.3 | 0.0 | 5.4 |
| 2010–2014 (%) | 16.1 | 77.9 | 0.1 | 0.4 | 1.0 | 95.5 | 0.3 | 95.8 | 4.2 | 0.0 | 4.2 |
| 2015–2019 (%) | 15.0 | 74.5 | 0.7 | 2.1 | 3.4 | 95.6 | 0.6 | 96.3 | 3.4 | 0.3 | 3.7 |
| 2020–2023 (%) | 10.8 | 67.6 | 1.9 | 1.6 | 11.7 | 93.6 | 3.7 | 97.3 | 2.0 | 0.7 | 2.7 |
| South | |||||||||||
| 2004–2009 (%) | 69.2 | 13.5 | 6.3 | 2.3 | 2.6 | 93.9 | 0.3 | 94.2 | 4.7 | 1.1 | 5.8 |
| 2010–2014 (%) | 62.3 | 20.6 | 7.7 | 4.6 | 1.9 | 97.1 | 0.2 | 97.3 | 2.4 | 0.2 | 2.7 |
| 2015–2019 (%) | 54.6 | 24.2 | 8.2 | 7.7 | 2.8 | 97.5 | 0.4 | 97.9 | 1.9 | 0.2 | 2.1 |
| 2020–2023 (%) | 39.1 | 26.3 | 13.7 | 9.9 | 6.8 | 95.8 | 2.2 | 98.1 | 1.7 | 0.3 | 1.9 |
| Southwest | |||||||||||
| 2004–2009 (%) | 21.0 | 29.0 | 22.5 | 0.0 | 10.9 | 83.4 | 4.5 | 87.9 | 7.4 | 4.7 | 12.1 |
| 2010–2014 (%) | 21.9 | 50.8 | 10.5 | 0.8 | 9.6 | 93.7 | 1.9 | 95.6 | 2.5 | 1.9 | 4.4 |
| 2015–2019 (%) | 13.7 | 63.4 | 14.1 | 0.9 | 4.6 | 96.7 | 1.1 | 97.9 | 1.0 | 1.1 | 2.1 |
| 2020–2023 (%) | 20.2 | 48.9 | 19.5 | 0.9 | 7.9 | 97.4 | 0.8 | 98.2 | 1.3 | 0.4 | 1.8 |