
PMC:7143707 / 7544-7666
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T58","span":{"begin":0,"end":122},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Higher designations such as P100 mean they filter out 99.99% of particles (P= particles; 100=essentially 100% efficiency)."}