PMC:7143846 / 2352-2500 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T18","span":{"begin":0,"end":148},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Ever since then, epidemic prevention was comprehensively upgraded and marked the real beginning of universal concern, indicating widespread impacts."}