PMC:7784787 / 15242-15496 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T131","span":{"begin":0,"end":254},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"It is therefore critical that universal public masking will involve optimally suppressive materials that are comfortable to wear for extended periods, can be produced in large quantities from common household materials, and are re-usable and inexpensive."}