vaccine mandate. i have a map of california up. los angeles county included in the counties with high transmission. the cdc says you should be wearing a mask even in indoors in this situation. that's los angeles. we've lived through this. these are the cases among children. spiking dramatically just as we hit back to school season. more than a quarter of a million new cases. should other school districts be copying what appears to be about to happen in los angeles. public school districts mandating vaccines for everybody eligible? >> john, i think so. i think this will be a good public policy and good public health. this is not the first time that we have vaccine mandates in schools. there are many vaccines required for children to go to school throughout the nation. so i think it will just make a lot of sense. i think the biggest challenge we have right now is that children under 12 are not eligible for vaccination. so until that happens, which would probably be as later this year or next year, we have to get everybody around them, 12 and older, to be vaccinated. if we don't do that, we'll