20% of the schools, some maybe doing no testing. >> you know, i think that testing is certainly a tool that we have to identify people early and so that we can isolate those people if we know them to be positive. and that certainly helps. i think testing on a large scale is very, very difficult to do logistically. so i do have concerns about really the reality of how that gets done. in the districts that can do it, i think that it can provide benefit. but it is a difficult thing to suggest that all school districts do. >> yeah, you can see how it would be tough logisticsly. dr. massena, thank you so much for being with us. and surging delta variant being blamed for a disappointing jobs report. we'll speak live with labor secretary marty walsh about the administration's efforts to turn