think about how we start peeling off this requirement for masking, for other things, asymptomatic testing, things we've done to control this virus. one of the most important things we've continue to do is vaccinate people and highly vaccinated communities, i think it makes a lot of sense to roll back masking requirements and indoor settings and to go to optional situation school. it's important to track certain metrics and i think the number of new hospitalizations secondary to covid and the icu capacity are two good metrics to follow as we make decisions. >> honestly, the metric has changed over the course of the pandemic. at first, it was just case rates that would imply when things needed to start shutting down again and now it seems like it's really changing. you mentioned vaccination rates are key. i want to play for you what dr. jonathan reiner said because he really thinks vaccination rates are key in this question of when