PMC:7784787 / 11117-11293 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T99","span":{"begin":16,"end":148},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"tal materials). In the image of the FFP1 mask, the wisp in front of the mask can be seen to originate at the cheek and did not penetrate the fabric. These leakage jets tend to "}