1. ThisIsOurShot and VacunateYa, Los Angeles, California, and Program on Regulation, Therapeutics, and Law (PORTAL), Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts (H.S.L.)
2. Stanford Internet Observatory, Stanford, California (R.D.)
3. American Board of Internal Medicine and ABIM Foundation, Philadelphia, Pennsylvania (R.J.B.)
4. Critica, Bronx, and Division of General Internal Medicine, Weill Cornell Medical College, New York, New York (D.S.).