in july. you can see there's dropoff there according to this study. but again, we'll see if this sort of holds up in larger data sets and larger numbers of people, but let me show you something else that was in that study that got less attention but i think was more important. that really has to do with what we're talking about for some time now, the impact on hospitalizations and deaths. look, guys, 100% protection from deaths from these vaccines. i know sometimes we gloss over that but that is obviously a very significant number and obviously a very high protection against hospitalizations as well. that will be the most critical thing going forward in terms of potential third shots for people. if you start to see a decrease in those numbers overall, severe illness protection starting to go down, that's when we might start thinking about the third shots for the general population. as far as mixing and matching goes, which i think was the other part of her question, right now the official line is if you got pfizer, you should