districts have been forced to close due to the surge. joining me now with the latest is nbc news correspondent, shaquille brewster, live from charleston, south carolina. also with us, dr. irwin redlener, a pediatrician and founding director of the national center for disaster preparedness, he's also an msnbc public health analyst. thanks, guys, for being with us. so, doctor, let me start with these pfizer trial results. what do they mean in this big timeline to get kids vaccinated? >> well, this is incredibly good news, chris, and it's not a moment too soon, as they say. but i am absolutely thrilled that we'll finally be able to get some assured protection for children. and it's especially timely now because we've just sent almost 55 million kids back to school. and i'm very worried that without this vaccine, those schools will become a -- could become a breeding ground for promulgating the covid-19