David O’Connor, a virologist at the University of Wisconsin, said the most interesting feature of the Los Alamos research is that the same pattern was seen in multiple locations. But he said “significant caution is warranted” because the data was not collected randomly. The vast majority of SARS-CoV-2 genomes in online databases come from Europe and North America, meaning strains from these regions are overrepresented in research
University of Wisconsin virologist Thomas Friedrich, who has spent years studying the evolution and transmission of the Zika virus, said a virus that makes its way into a highly susceptible population — for example, Europe in January — will spread like wildfire, quickly becoming the dominant strain in the region