How World War II spurred vaccine innovation
Reading time: 7 minutes
Before World War II, soldiers died more often of disease than of battle injuries. The ratio of disease-to-battle casualties was approximately 5-to-1 in the Spanish-American War and 2-to-1 in the Civil War. Improved sanitation reduced disease casualties in World War I, but it could not protect troops from the 1918 influenza pandemic. During the outbreak, flu accounted for roughly half of US military casualties in Europe.