spectrum of illness more emphasis on younger people including kids. again, i don't want to overstate the confidence that we have about whether delta is more dangerous to children. the balance has not been fully settled there but it's tipping in that direction. >> we're going to bring in dr. sanjay gupta. i know you have questions. >> i relish the opportunity to ask my former professor a couple questions. i want to follow up on the question about boosters. we heard from governor edwards that 10% of patients in the hospitals are vaccinated and they are who you would imagine. people are vulnerable and older. he was concerned about that. you're saying you're not recommending boosters for anybody. what would be the trigger for that keeping in mind that it takes a while for those boosters to kick in and these numbers are going up.