PMC:7796344 / 7462-7667 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T46","span":{"begin":77,"end":155},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"tion were reduced by 45%, 74%, and 96% by wearing masks, respectively” [20]. The evidence is both contradictory and inconclusive [13,14,15,16,17,18,19,20].\nOn 27 February 2020, the KSA Foreign Ministry too"}