Supplementary Figure 1. Venn diagram
The Venn diagram shows the interactions between different gut microbiota
and the severity of COVID-19. The circles represent mild COVID-19 (blue
circle), moderate COVID-19 (yellow circle) and severe COVID-19 (red
circle). The numbers in the circles represent the types of gut
microbiota. The overlapping areas between the circles represent the
number of studies in which the same type of gut microbiota was
simultaneously involved in different degrees of COVID-19 infection.