PMC:7079563 / 2848-2946 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T17","span":{"begin":27,"end":28},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"er-spreading” event became a hallmark of the epidemiology of the disease. On January 20, 2020, in "}