PMC:7247483 / 82-157
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T3","span":{"begin":24,"end":36},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"e facts and challenges\n\nDear Editor,\nSince December 2019, an outbreak of co"}