PMC:7519301 / 10782-10999 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T99","span":{"begin":89,"end":90},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"samples have been increasingly obtained across Europe and from the United States (Fig. 1 A and C). The tree shows numerous introductions of different variants across the globe, with introductions from distant location"}