PMC:7103735 / 48402-48534 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T403","span":{"begin":0,"end":132},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"If the attack rate is sufficiently high, it will be tremendously challenging to contain the spreading before herd immunity develops."}