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. To say nothing of the Black Death.
