For schools to be safe in the fall, we need a screening program which focuses on frequency, convenience and fast turnaround time of high-specificity tests but which can accept much lower sensitivity. Eg. see https://www.nytimes.com/2020/07/03/opinion/coronavirus-tests.html, https://www.wired.com/story/a-wisconsin-city-experiments-with-a-faster-diy-covid-19-test/ https://twitter.com/RickByers/status/1290062606187675649