PMC:7143707 / 12740-12841
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T100","span":{"begin":0,"end":101},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"BVMs, and other ventilatory equipment, should be equipped with HEPA filtration to filter expired air."}