Table 1. Distribution of HIV-1 subtypes, circulating recombinant forms (CRFs), and unique recombinant forms (URFs) in China.

Characteristics	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: CRF denotes circulating recombinant form; URF denotes unique recombinant form. Other CRFs encompass CRF02_AG, CRF03_A6B, CRF06_cpx, CRF09_cpx, CRF10_CD, CRF11_cpx, CRF12_BF, CRF13_cpx, CRF15_01B, CRF16_A2D, CRF18_cpx, CRF19_cpx, CRF22_01A1, CRF25_cpx, CRF33_01B, CRF34_01B, CRF35_A1D, CRF43_02G, CRF45_cpx, CRF51_01B, CRF52_01B, CRF53_01B, CRF54_01B, CRF56_cpx, CRF57_BC, CRF58_01B, CRF59_01B, CRF61_BC, CRF62_BC, CRF64_BC, CRF65_cpx, CRF67_01B, CRF68_01B, CRF69_01B, CRF76_01B, CRF77_cpx, CRF79_0107, CRF80_0107, CRF84_A1D, CRF85_BC, CRF87_cpx, CRF88_BC, CRF96_cpx, CRF97_01B, CRF100_01C, CRF101_01B, CRF102_0107, CRF103_01B, CRF104_0107, CRF105_0108, CRF106_cpx, CRF107_01B, CRF109_0107, CRF110_BC, CRF111_01C, CRF112_01B, CRF113_0107, CRF114_0155, CRF115_01C, CRF118_BC, CRF119_0107, CRF120_0107, CRF121_0107, CRF123_0107, CRF125_0107, CRF126_0755, CRF128_07B, CRF134_0107, CRF137_0107, CRF140_0107, CRF145_0107, CRF149_01B, CRF151_0107, CRF154_0755, CRF155_0755. Other subtypes include subtypes A1, A3, A6, C, D, F1, F2, G, and H. The unweighted row represents the actual proportions of subtypes, CRFs, and URFs in the sequence database. The weighted row presents estimated proportions based on actual sequence distributions and provincial HIV infection reports.Total CRFs is the sum of CRF01_AE, CRF07_BC, CRF08_BC, CRF55_01B, and other CRFs. Total recombinants is the sum of total CRFs and URFs. Total subtypes is the sum of subtype B and other subtypes.
Weighted (%)	32.1	39.1	9.2	2.4	6.0	88.9	1.3	90.2	8.7	1.1	9.8
Unweighted (%)	38.6	33.2	7.0	4.3	5.4	88.5	1.1	89.6	9.6	0.8	10.4