PMC:7014668 / 1272-1348 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T5","span":{"begin":32,"end":35},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"}],"text":"ffectiveness, airport screening has been previously implemented during the 2"}