“…However, gradually more studies have been published on the circulation and phylogenetic characterization of environmental NPEVs, such as the research work in the United States, Japan, Finland, Georgia, Greece, Iran, China, etc. (1,7,9,10,12,19,21,25,27). A high degree of genetic diversity and multiple genetic lineages of environmental NPEVs were also found by studies conducted in Georgia and Shandong (10,25,27), respectively, which probably resulted from the evolution of endemic viruses over a long period or from the importation of viruses from other regions.…”