what human price do we pay for knowledge? that's the tricky part. obviously, when you're testing something in thousands or even tens of thousands. that's not tens of millions and sometimes you find out things later that are much rarer. myocarditis, a 1 in 20,000-person phenomenon which you'll not pick up preapproval. your heart is always in your throat at some level but there are no risk-free choices. they're just choices to take different risk. the choice to not take a vaccine is not a risk-free choice. children account for 27% of cases. now there's 2,000 hospitalizations every week. we certainly are seeing it in our hospital. so there are no risk-free choices. >> dr. paul offit. his new book "now bet your life" is out now. thank you so much again. coming up, a new update from the fbi on the search for gabby petito's missing fiance. how the focus has shifted. that's next. oney can liberty mutual save you?