Editor's note: Timothy Craig Allen co-authored this column.Everyone desperately hopes that the coronavirus will recede as spring arrives. Of the seven pre-existing coronaviruses that afflict humans, at least four are seasonal. This is also true of most strands of the common flu, as the low humidity in the winter helps viruses to thrive. How COVID-19 will respond isn’t known yet. It was only discovered in late December, but there is already some statistical evidence indicating that warm weather will inhibit its spread. There is also evidence that countries with travel restrictions have experienced lower death rates. Usually, the weather starts...