Fig. 1
From: Prevalence and genetic diversity analysis of human coronaviruses among cross-border children
Epidemiological characteristics of human coronaviruses infection among Cross-border children. a Distribution of the four HCoV infections based on Month group. b Distribution of the four HCoV infections based on Age group. Positive and co-infected cases were plotted on the left Y-axis and others were plotted on the right Y-axis. Different strains or total HCoVs were indicated according to the key