peter chen honb. i want to talk about how we are expanding eligibility. many states are. and here in california you know it's people 50 and over now and in two short weeks people over 16 as well. at the same saying hey, we have shortage. so i'm wondering why the disparity from county to county? you have contra costa saying yeah, come on down. what is happening? >> i just think it's matter about the size and the complexity of the county. if you look at the states where they had really high proportion of folks vaccinated. and supplying and in step with demand. like new mexico and north dakota. alaska. they are all really small states with relatively less complex hospital systems. so that is one thing. so, like a santa clara very populous is probably going to have a harder time vaccinating everyone in all of these complex ecosystems than a yolo county, for example. so i think it's not a precise science of matching population to numbers of vaccines. and i think that is what people are butting up against right now. >> all right. erika lyons has a question about the johnson & j