PMC:6988269 / 19694-19916 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T206","span":{"begin":80,"end":87},"obj":"http://purl.obolibrary.org/obo/SO_0000418"},{"id":"T207","span":{"begin":128,"end":133},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T208","span":{"begin":148,"end":153},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"}],"text":"ivity was seen but they were negative upon retesting with the same assay. These signals were not associated with any particular virus, and for each virus with which initial positive reactivity occurred, there were other sa"}