PMC:7060038 / 12211-12312 JSONTXT

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{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7060038","sourcedb":"PMC","sourceid":"7060038","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7060038","text":"ck the fraction of cases detected using symptom screening or risk screening at arrival or departure. ","tracks":[]}