PMC:7068163 / 374-424
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T1","span":{"begin":6,"end":7},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"uring a large contact tracing investigation, compa"}