PMC:7784787 / 3826-4013 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T34","span":{"begin":11,"end":89},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" fit test. In fact, to our knowledge, a standard test for outward leakage does not exist. When both leakage and fabric penetration are considered for workplace usage of PPE, the result is"}