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CORD-19:12fbecd4737a9af7b8fab5267094fdfa754f25fa / 26446-26579
Annnotations
CORD-19_Custom_license_subset
{"project":"CORD-19_Custom_license_subset","denotations":[{"id":"T144","span":{"begin":0,"end":133},"obj":"Sentence"}],"text":"However, the difficulty of developing mucosal and particularly oral vaccines using nonliving approaches should not be underestimated."}
CORD-19-Sentences
{"project":"CORD-19-Sentences","denotations":[{"id":"TextSentencer_T144","span":{"begin":0,"end":133},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"However, the difficulty of developing mucosal and particularly oral vaccines using nonliving approaches should not be underestimated."}