The deadly coronavirus that is morphing into a global threat could have infected five to 10 times more people than Chinese officials have acknowledged, a group of U.S. researchers said.The Feb. 18 study, which has not been peer-reviewed, was co-led by Lucia Dunn, economics professor at Ohio State University, and Mai He, pathology professor at Washington University School of Medicine in St Louis.Drawing from both official and unofficial data sources, the study suggested the cumulative infections and deaths could be “substantially higher” than officially stated—by a factor of 5 to 10.“So many people are doubting the numbers in China...