Add to ORKG• Two waves of epidemic have passed, but a third, less severe wave may follow• Rockwood: “The problem grows increasingly difficult as methods of transportation improve. When persons travel, they spread flu.”• Epidemic peaked in Cleveland on Nov. 5: death rate 66 per thousand• Second peak Dec. 24: death rate 28 per thousand• One advance reported: “This advance consists of pooling blood drawn from 50 to 100 persons who have been flu sufferers, and in using injections of this blood serum into the veins of patients in the acute stages. This has a curative effect.”Newspaper article