*2. 多分これ→Wellcome Open Research 2020, 5:181 Last updated: 13 OCT 2020。この論文のAbstractには、PCR-positive sera inoculated into cell culture did not produce any cytopathic effect or yield an increase in detectable SARSCoV-2 RNA. Viral RNA was detectable at low viral loads in a minority of serum samples collected in acute infection, but was not associated with infectious SARS-CoV-2 と明記されている。