Infectious disease in the twentieth century
In the first half of the century, the three great killers among endemic diseases—smallpox, malaria, and tuberculosis—raging around the world (we think today of malaria as a tropical malady but in the 1920s there were outbreaks as far north as Siberia) were each responsible for more deaths than the 80 million who died in both world wars. Innovations stemming from the Second World War, an immense hothouse of technological progress, made it possible to contemplate combatting infectious disease on a global scale.