re: #214 Jay C
I believe so: I think the Biden Admin basically inherited that system after it was already established,, and have had to go with it in the interest of swift mass vaccination, rather than spend(waste) time crafting a new distribution/inoculation system.
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At this point it may be too late to revise the existing process, but as Eclectic Cyborg suggests above, couldn’t it be augmented it by adding facilities on federal properties or partnering with states to have federal agencies involved in mass vaccinations? The J&J vaccine is likely to be the big game changer, especially once there is enough out there to distribute to all local doctors and hospitals.