Fig. 1From: HIV-1 pretreatment drug resistance and genetic transmission network in the southwest border region of ChinaThe interregional HIV-1 genetic transmission networks. A HIV-1 molecular network coded by the individuals’ registered residence. B The matrix of HIV-1 genetic links between the different regions. The cells on the diagonal represented the number of the links in the same region. The other cells represented the number of the links between the different regionsBack to article page