EditorialMaria Borisova, left, photographs her brother, Sergey, and his wife, Oksana Moskvina, as Lucas Cranach the Elder’s “Judith with the Head of Holofernes” (c. 1530) as they stay at home in self-isolation to prevent spread of the coronavirus outside Moscow, April 9, 2020. (Sergey Ponomarev/The New York Times)