The southern climate, with its heat, oppressive humidity, and stagnant marshland, accentuated disease and suffering for inhabitants of the Old South, from its early settling through the Civil War and Reconstruction. Vicious illnesses--from malaria and yellow fever to dysentery, cholera, typhoid fever, typhus, and smallpox--beleaguered those dwelling in the South and were blamed on the particular combination of air, earth, and water characteristic...