https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-announce-data-preclinical-studies-mrna
https://www.nature.com/articles/s41586-021-03275-y
Vid:
https://tlcsenate.granicus.com/MediaPlayer.php?clip_id=15926
Texas State Senate hearing on May 6, 2021