Homeopathy was successfully used during the Spanish Flu Pandemic of 1918.
Interestingly enough, the death rate of Spanish-flu patients treated with allopathic medicine was almost 30%, while the death rate for those treated homeopathically was 1.05%. Gelsemium was the remedy most commonly used; and yet the FDA, if it had its way, would remove this remedy without any hesitation or remorse whatsoever. – Scott Tips, president National Health Federation
Dean W. A. Pearson of Philadelphia collected 26,795 cases of influenza treated by homoeopathic physicians with a mortality of 1.05%.
Meanwhile, the average mortality from conventional treatments was 30%. 6,602 cases with 55 deaths, which is less than 1%. In an article from the 1921 Journal of the American Institute Of Homeopathy, thirty physicians in Connecticut responded to his request for data.