ryan ribeiro about each of these developments. more than a thousand students in cherokee county have been quarantined after dozens of students and staff tested positive for covid-19 and now one high school in the district is closing at least through the end of the month. what can we learn from the school district? what should be the next steps? >> so this is perhaps an instructive case because this is one of the first school districts in the country to open for face-to-face instruction. and i would say it shouldn't be surprising they had a number of positive cases right off the bat. i think that will be the case all across the country. the lessons to be learned here, if you're a school district looking to have in-face, in-person instruction, it's so important to make sure that you have social distancing in place, that you have masking. that way when positive cases come, the number of exposures will be lower. >> a new study shows that teenagers and young adults who vape are five times more likely to be diagnosed with covid-19. what