The United States President William Henry Harrison had caught cold standing in the rain at his inauguration and died of pneumonia a month later. Peter the Great had caught cold while sighting a ship and died within a week. And not just colds. Henry the Fifth had died of dysentery, and as a result the English lost everything they’d gained at Agincourt. The undefeatable Alexander the Great was defeated by malaria, and the face of the whole continent of Asia changed.

