Table 1. Characteristics of HIV-1 CRF01_AE strains in different clusters.

	Number	Risk factors a	Province	Sampling Year
Cluster 1	40	MSM (92.5%),	LiaoNing(65%)	2007–2012	2009 (47.5%),
		Hetero (7.5%)			2010 (35%)
Cluster 2	27	MSM (85.71%)	BeiJing (40.7%),	2007–2011	2010 (59.2%),
			LiaoNing (25.9%)		2009 (18.5%),
					2007 (14.8%)
Cluster 3	37	Hetero (62.16%),	GuangXi (48.6%),	2005–2007	2007 (70.3%),
		IDU (37.83%)	GuangDong (18.9%)		2005 (24.3%),
					2006 (5.4%)

^a Risk factors: MSM, men who have sex with men; Hetero, heterosexual; IDU, Intravenous Drug User

Bold values are the most common characteristics of each lineage.