PMC:7461420 / 268-351 JSONTXT

{"project":"LitCovid-PubTator","denotations":[{"id":"32","span":{"begin":66,"end":81},"obj":"Species"}],"attributes":[{"id":"A32","pred":"tao:has_database_id","subj":"32","obj":"Tax:694002"}],"namespaces":[{"prefix":"Tax","uri":"https://www.ncbi.nlm.nih.gov/taxonomy/"},{"prefix":"MESH","uri":"https://id.nlm.nih.gov/mesh/"},{"prefix":"Gene","uri":"https://www.ncbi.nlm.nih.gov/gene/"},{"prefix":"CVCL","uri":"https://web.expasy.org/cellosaurus/CVCL_"}],"text":"e from mild to lethal. Since the start of the 21st century, three β‐coronaviruses h"}