pharmacy or your doctor's office. that will set you up. >> drmpblths doctor, i want to ask you when we're giving the initial rounds of the vaccine. it seems as if early on we got the two dose very quickly. either three weeks or four weeks, because we were in -- it was clear we were in a semi emergency moment. the science seems to say we actually need more spacing between dose one an dose two. so why as we're starting to dose five to 11-year-olds are we using the old schedule when our science tells us actually we might be better off spacing out doses here? why haven't we changed the regimen in. >> well, chuck, are you exactly right. there has been much discussion about that it's likely to be correct. before we can change what we do, we have to study it in people, make sure it's effective and safe. and those studies haven't been done. i don't want to make changes on