The problem is not administering one vaccine. If you were pretty sure which one to use you could take a gamble- which is exactly what we have done with early au

The problem is not administering one vaccine. If you were pretty sure which one to use you could take a gamble- which is exactly what we have done with early auth of the Moderna and Pfizer! But If you don’t yet know which ones actually work yet, do you give everyone ten different experimental vaccines in one shot?