PMC:7126544 / 54986-55054 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7126544","sourcedb":"PMC","sourceid":"7126544","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7126544","text":"most local governments required that all passengers must wear medica","tracks":[]}