1. National Institute of Allergy and Infectious Diseases, Bethesda, Maryland (D.F., J.F., M.P.F., M.N.)
2. Fred Hutchinson Cancer Research Center, Seattle, Washington (H.E.J., L.N.C., M.J., D.D., Y.F., Y.H., Y.H., O.H., J.G.K.)
3. Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts (L.R.B.)
4. Baylor College of Medicine, Houston, Texas (H.M.E.)
5. University of Washington, Seattle, Washington (T.R.F., A.L., M.C.)
6. Merck & Co., Inc., North Wales, Pennsylvania (D.V.M.)
7. Rollins School of Public Health, Emory University, Atlanta, Georgia (D.B.)
8. Moderna, Inc., Cambridge, Massachusetts (S.H., H.Z.)
9. AstraZeneca, Cambridge, United Kingdom (I.H.)
10. Janssen Pharmaceuticals NV, Beerse, Belgium (A.V.)
11. Novavax, Inc., Gaithersburg, Maryland (I.C.)
12. Karolinska Institutet, Solna, Sweden (E.G.)
13. Institute for Global Health and Infectious Diseases, University of North Carolina, Chapel Hill, North Carolina (M.S.C.)
14. Fred Hutchinson Cancer Research Center and University of Washington, Seattle, Washington (L.C., P.B.G.)
15. University of Maryland School of Medicine, Baltimore, Maryland (K.M.N.).