Seasoning, Disease Environment, and Conditions of Exposure. New York Union Army Regiments and Soldiers

Daniel Scott Smith, Health and Labor Force Participation over the Life Cycle: Evidence from the Past (University of Chicago Press, 2003), chap. 4, https://www.nber.org/books-and-chapters/health-and-labor-force-participation-over-life-cycle-evidence-past/seasoning-disease-environment-and-conditions-exposure-new-york-union-army-regiments-and-soldiers.