Despite the ongoing Covid-19 pandemic, nearly 20,000 people are now studying, working, or living at MIT on any given day. Thanks to a robust plan to mitigate the spread of Covid-19 on campus — masking, attesting, testing, and access control — the number of positive Covid-19 cases has remained very low (at or below 0.1% of tests conducted) in recent weeks. Because of that statistic, nearly all classes, labs, and offices have been, and remain, in-person. Ian Waitz, vice chancellor for undergraduate and graduate education, who has led the MIT…