CORD-19:4abc50cfc81265083d4cb2aed0a493bb704d0b5b / 54789-55174 JSONTXT

{"project":"CORD-19-Sentences","denotations":[{"id":"TextSentencer_T275","span":{"begin":0,"end":385},"obj":"Sentence"},{"id":"T3856","span":{"begin":0,"end":385},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"However, with the development of modern technology, these live-attenuated viruses used for vaccines are generally replication-deficient or restricted; their pathogenicity is commonly maximally or completely abolished and, after systemic manipulation of their genome, these viruses are theoretically highly stable and irreversible and virulence restoration could be effectively avoided."}