Fig. 1

a, b MCC trees and map of geographic location transition based on CRF01_AE and CRF07_BC sequences in this study. Purple areas indicate Tianjin strains in this study. c, d Red arrows indicate decisive rates with BF ≥ 1000; orange arrows indicate very strongly supported rate with 100 ≤ BF < 1000; blue arrows indicate strongly supported rates with10 ≤ BF < 100