As I have noted, we do not know how rapidly or how widely the virus will spread, nor do we know how deadly it will be. People over 65 seem to suffer more serious illnesses than younger people, especially if they have underlying health problems. As is the case with other maladies, the older and frailer you are, the more likely it is that you will die from the coronavirus.

That said, it is worth maintaining some perspective on the disease. In early February, the CDC estimated that at least 12,000 people had died from the flu from October 1, 2019 through February 1. That number might be as high as 30,000. So far, CDC estimates, some 31 million Americans have caught the flu this season. Somewhere between 200,000 and 370,000 of those have been hospitalized because of the virus.

As for deaths, the CDC estimates that it will probably equal or surpass the 2018-2019 season when there were 34,000 flu-related deaths in America. (The 2017-2018 season saw 61,000 deaths.) Writ large, the World Health Organization estimates that the flu kills between 290,000 and 650,000 annually.

Contrast those numbers with the numbers we have seen so far regarding the coronavirus. On Saturday, Governor Andrew Cuomo declared a state of emergency in New York. Perhaps that was the prudent thing to do. But I note that, as of today, there have been 78 who have tested positive for the virus in New York. Across the nation, more than 380 people have tested positive to coronavirus, and 19 people have died.

Are we witnessing the beginning of a new plague? Will we, in years to come, need our Daniel Defoe to provide a chronicle of a deadly scourge?

We do not know. But I suspect not. There will be more cases and more deaths. But we are reacting, and perhaps overreacting, to limit the spread of a disease whose lethality seems scarcely more serious than the common flu?

I am not quite sure when we will be able to look back, probably with some slight embarrassment, and say we really overdid the sanitary wipes, the face masks, and the paranoia. Still, the great Balliol don Benjamin Jowett was right: “precautions are always blamed. When they are successful, they are deemed to have been unnecessary.”