PMC:7781502 / 1948-2155 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T21","span":{"begin":76,"end":180},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"numerous researchers started investigations on the novel etiological agent. Currently, over half a year has passed since the pandemic was declared by the World Health Organization. There is little knowledge "}