@wsbgnl I suspect this is biased low. It's using routine medical blood testing and that's going tilt toward those better served by medical care (i.e. higher income, etc.), who are also probably less infected. There is no adjustment in the study for income or race.
@wsbgnl我怀疑这有失偏颇。它使用的是常规医学血液检测，这将倾向于医疗服务更好的人群（即收入更高的人群等），他们也可能感染较少。研究中没有对收入或种族进行调整。