In this November 1918 photo, a nurse tends to a patient in the influenza ward of the Walter Reed hospital in Bethesda, Md. AP Photo/Harris & Ewing via Library of Congress By Elizabeth Wrigley-Field,University of MinnesotaandMartin Eiermann,Duke University Racial disparities ininfluenza deaths shrunk by 74% in U.S. citiesduring the1918 flu pandemicdue to an odd … Continued