SFChronicleVirusDaily

BERKELEY, CA - MARCH 10: Professor Murat Arcak (center) and Professor Seth Sanders teach a Linear Systems class at Wheeler Hall where normally over 300 students are in attendance on Tuesday, March 10, 2020 in Berkeley, California. Because of the coronavirus-triggered suspension of in-person classes, many professors are in limbo because the UC system hasn't yet been able to determine how many of its professors it will be able to retain using a combination of in-person and online classes. (Gabrielle Lurie/The San Francisco Chronicle via Getty Images)