The Spanish flu pandemic that battered America in 1918 produced similar reactions. John M. Barry, author of “The Great Influenza,” reports that as conditions worsened, health workers in city after city pleaded for volunteers to care for the sick. Few stepped forward.

In Philadelphia, the head of emergency aid pleaded for help in taking care of sick children. Nobody answered. The organization’s director turned scornful: “Hundreds of women … had delightful dreams of themselves in the roles of angels of mercy. … Nothing seems to rouse them now. … There are families in which every member is ill, in which the children are actually starving because there is no one to give them food. The death rate is so high, and they still hold back.”

This explains one of the puzzling features of the 1918 pandemic. When it was over, people didn’t talk about it. There were very few books or plays written about it. Roughly 675,000 Americans lost their lives to the flu, compared with 53,000 in battle in World War I, and yet it left almost no conscious cultural mark.