I also think, don't be surprised if, later on, we're going to need a boost for all of them—they'll be a third dose of the Moderna [and] Pfizer vaccines or a second dose of the J&J. And what that will do: It'll elevate virus neutralizing antibody titers higher, it'll create more durability of protection, I think, and that boost will be reconfigured for the South African and the Brazilian variant, which are not here in a big way in the US, but may become a bigger problem down the line.
