Homeopaths were extremely successful in treating yellow fever in epidemics of the 1800s.

Yellow fever
(Courtesy of André Saine, ND DHANP)
The mortality from yellow fever would vary from one epidemic to the other but was frequently recorded falling between 20 to 70 percent (1).  In 1853, at the Mississippi State Hospital in Natchez, the allopaths lost 55 percent of their cases with yellow fever.
At the same time in Natchez, Drs. Davis and Holcombe, two homeopathic physicians, treated 555 cases with yellow fever with 33 deaths, a mortality of 6.0 percent (2). Between 1853 and 1878, 6,569 cases with yellow fever were treated homeopathically in the Greater New Orleans area with a loss of 360 patients, a mortality of 5.5 percent (3). 
References:
1)  Kenneth F. Kiple (ed.). The Cambridge World History of Human Disease. Cambridge: Cambridge University Press, 1993, 1100.
2) William H. Holcombe. Further observations upon yellow fever and its treatment. North American Journal of Homœopathy 1856; 4 : 374-402.
3)  Wm. H. Holcombe et al. Special Report of the Homœopathic Yellow Fever Commision Ordered by the American Institute of Homeopathy for Presentation to Congress. Philadelphia : Boericke & Tafel, 1879, 13.