The findings match what has been observed on a smaller scale in other studies, said Dave O’Connor, a virologist at the University of Wisconsin at Madison. Superspreading events, which provide the virus with huge numbers of hosts in a small amount of time, are driving the global outbreak. Delays in returning test results make it much more difficult to mitigate their effects; by the time those infected in such events know they’re sick, they have probably infected many more people
University Communications