Brussels, August 4 Geneva news: who director general Tan Desai said on the 3rd that who will set up an international expert group including Chinese experts to jointly find the animal source of the new coronavirus. At the regular meeting of the same day, Tan Desai said that on the issue of the origin of the new coronavirus, the advance team to China has completed the preparatory work recently. On this basis, who will establish an international expert group including Chinese experts to continue relevant research. Michael Ryan, who’s head of the health emergency program, told the meeting that more extensive retrospective epidemiological studies of the new coronavirus should be conducted to fully understand the link between cases. The research can start from “the place where the clustering cases appear first”, so as to systematically search for the virus “the first signal across the species barrier between animals and humans”, and then turn to the research on the animal source.