It is more informative that there was no measurable correlation between population density and sampling/number of cases (r???=??????0.08634058, p???=???0.6442/r???=???0.04543189, p???=???0.8083)- i.e, highly populated regions, including major cities such as Beijing, Shanghai or Chongqing with better resources, are not being preferentially sampled.Figure 8Investigation of sampling accuracy.Discussi