Yesterday was the last day of school before lockdown. So the  kids are at home today when I leave for work. I take the train to UAB–I’m a committee member in a dissertation oral defense that has not been canceled. The campus is still open but there are no students around. At the end of the defense, the candidate, who has just come back from China, offers each member of the committee a few masks as a substitute for the cheese and wine traditionally offered by candidates at the end of defenses in Spain.