PMC:7019868 / 4130-4230 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T39","span":{"begin":15,"end":17},"obj":"http://purl.obolibrary.org/obo/CLO_0050050"},{"id":"T40","span":{"begin":26,"end":29},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"}],"text":"Therefore, the S1 subunit has long been considered to be the primary target for vaccine development."}

{"project":"LitCovid-sentences","denotations":[{"id":"T27","span":{"begin":0,"end":100},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Therefore, the S1 subunit has long been considered to be the primary target for vaccine development."}