Conclusion

This report has shown thatacommunity serum survey can detect  individuals who haven’t had a COVID-19 clinical test or diagnosisbut produce antibodies that recognize SARS-CoV-2 Spike S1. Therefore serum antibodyassayscouldbe used as aquick andcheap screening tool toevaluate community spread, preexisting humoral responses or potential convalescent serum donors.

这是主结论， 抗体检验可以排查病毒感染扩散， 以及确定病人感染历史

It is possible that past exposure to other coronaviruses provides some humoral cross reactivity to COVID-19.

This should be closely evaluatedto better understand the potential for spread in Oregon and the rest of the United States.