After 2010, the strain showed a trend of rapid spread and epidemic from Guangdong-Shenzhen to other provinces in China.
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The prevalence of CRF55_01B among HIV-1 strain and its connection with traffic development in China.
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By using the chi-square trend test, it was found that heterosexuals showed an increasing trend in three periods: 2007–2012, 2013–2015, and 2016–2018 ( Table 2 ).
CRF55_01B has an obvious trend of spread from MSMs to heterosexuals, mainly from young MSMs to young heterosexuals males ( Figure 4 ) .