PMC:7210464 / 674-785 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T4","span":{"begin":83,"end":84},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"y the middle of February. Population outflow from the outbreak source region posed a higher risk to the destina"}