PMC:7017962 / 703-864 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T5","span":{"begin":76,"end":79},"obj":"http://purl.obolibrary.org/obo/CL_0000990"},{"id":"T6","span":{"begin":80,"end":89},"obj":"http://purl.obolibrary.org/obo/CLO_0001658"},{"id":"T7","span":{"begin":151,"end":152},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"s at U.S. airports to identify ill travelers returning from Wuhan City (4). CDC activated its Emergency Operations Center on January 21 and formalized a process "}