PMC:7787218 / 668-732 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7787218","sourcedb":"PMC","sourceid":"7787218","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7787218","text":"clinical trials of the Pfizer–BioNTech and Moderna mRNA vaccines","tracks":[]}