Homoeopathy has gained increasing acceptance in Britain, Europe and the United States since the 19th century owing to its success in treating people during various infectious disease epidemics. The death rates from cholera, scarlet fever, typhoid, and yellow fever, following homoeopathic treatment were significantly lower than from the orthodox medical treatment of the era.
For example, of 61 patients treated homoeopathically at the London Homoeopathic Hospital during the cholera epidemic of 1854, there were 15 deaths – whereas at the Middlesex hospital, where conventional treatments were given, there were 123 deaths from 231 cases. The comparative death rates were 16.4% for homoeopathic treatment and 53.2% for conventional treatment. (British Homoeopathic Journal, October 1989, Vol.78)
The yellow fever epidemic in New Orleans and the Mississippi Valley in 1878 is another example of homoeopathic success. In New Orleans, 1945 cases were treated homoeopathically with 110 deaths (mortality of 5.6%). In the rest of the South, 1969 cases were treated homoeopathically with 151 deaths (mortality of 7.7%). This is a favourable comparison with a mortality rate for conventional treatment of at least 16%. (Harris Coulter, [1982, 2nd edition] Divided Legacy: The Conflict between Homoeopathy and the American Medical Association, pp.298-302)
The effectiveness of homoeopathic treatment for the 1918 ‘flu epidemic in USA is particularly striking.
Julian Winston’s  The Faces of Homoeopathy: An illustrated history of the first 200 years (pp.236- 237) quotes from the findings in W.A. Dewey’s article “A Chorus of Fifty in Harmony” in the Journal of the American Institute of Homoeopathy in 1921:
1. A Philadelphian Homoeopath, Dean Pearson collected 26,795 cases treated homoeopathically with a mortality rate of 1.05% compared with a rate of 30% for conventional treatment.
2. Frank Wieland M.D. of Chicago told how in a plant of 8000 workers there was only one death. Gelsemium was practically the only remedy prescribed and neither aspirin nor vaccines were used.
Contemporary examples of Homoeopathy’s effectiveness are outlined in the next two sections.