PMC:7796148 / 6290-6426 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7796148","sourcedb":"PMC","sourceid":"7796148","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7796148","text":"service has a regional structure, and different measures were taken by different regions, (e.g., different testing effort, quarantine po","tracks":[]}