Fortunately for the cause of science and of humanity, we had as Governor-General of Cuba at that time General Leonard Wood, of the United States Army. General Wood had been educated as a physician, and had a very proper idea of the great advantages which would accrue to the world if we could establish the fact that yellow fever was conveyed by the mosquito, and his medical training made him a very competent judge as to the steps necessary to establish such fact. General Wood during the whole course of the investigations took the greatest interest in the experiments, and assisted the Board in every way he could.

Amateurs are fond of advising that all practical measures should be postponed pending carrying out detailed researches upon the habits of anophelines, the parasite rate of localities, the effect of minor works, and so on. In my opinion, this is a fundamental mistake. It implies the sacrifice of life and health on a large scale while researches which may have little real value and which may be continued indefinitely are being attempted… In practical life we observe that the best practical discoveries are obtained during the execution of practical work and that long academic discussions are apt to lead to nothing but academic profit. Action and investigation together do more than either of these alone.

Shovels aren't very glamorous, but they've been liberating entire communities from malaria for the past 5,000 years.

The entire world has benefited and prospered since the decisive defeat of Yellow Fever, an unconventional and far-reaching military victory derived from the field medical discoveries of U.S. Army Major Dr. Walter Reed, designed and carried out by U.S. Army Major Dr. William Gorgas with the overall support under the command of U.S. Army General Leonard Wood.