The Pandemic of 1918

There are various causes of deadly new novel viruses, as I have recently learned, along with many of you. One of them is climate change, so we can be sure we'll be seeing more of them. But whatever the reasons for the fatality rate of Covid-19, we do know why the last global pandemic, the so-called "Spanish Flu" in 1918 was so extremely deadly. It was a pandemic caused by the particular conditions of the trenches of World War 1, and the movements of troops around the world at the end of the war. This war virus ultimately killed more human beings on planet Earth in six months -- in every corner of the globe -- than the carnage of World War 1 caused in four years.