Of course there are different linkages, whether technical or scientific, or through consular linkages, and also through our actual operation centres, but I think what is difficult is that we actually need to.... It's actually quite a difficult piece of epidemiology to ascertain whether some asymptomatic person could ever transmit. It's not just a matter of getting that data. The Chinese have been publishing the studies, and those studies are being critiqued on an international stage.
On February 5th, 2020. See this statement in context.