U.S. Army Medical Corps
Finding his youth limited his influence, and dissatisfied with urban life, Reed joined the
U.S. Army Medical Corps. This allowed him both professional opportunities and modest financial security to establish and support a family. After Reed passed a grueling thirty-hour examination in 1875, the army medical corps enlisted him as an assistant surgeon. By this time, two of his brothers were working in Kansas, and Walter soon was assigned postings in the American West. Over the next sixteen years, the Army assigned the career officer to different outposts, where he was responsible not only for American military personnel and their dependents, but also various
Native American tribes, at one point looking after several hundred
Apaches, including
Geronimo. Reed noticed the devastation epidemics could wreak and maintained his concerns about sanitary conditions. During one of his last tours, he completed advanced coursework in pathology and bacteriology in the
Johns Hopkins University Hospital Pathology Laboratory. While stationed at
Fort Robinson, Nebraska, Reed treated the ankle of Swiss immigrant Jules Sandoz, broken by a fall into a well. Reed wanted to amputate Sandoz's foot, but Sandoz refused his consent, and Reed succeeded in saving the foot by an extensive course of treatment. A photograph of a letter from Reed to Sandoz's father is reproduced in the first edition of
Old Jules, the 1935 biography of Sandoz by his daughter
Mari Sandoz. In 1893, Reed joined the faculty of
George Washington University School of Medicine & Health Sciences and the newly opened Army Medical School in Washington, D.C., where he held the professorship of Bacteriology and Clinical Microscopy. In addition to his teaching responsibilities, he actively pursued medical research projects and served as the curator of the Army Medical Museum, which later became the
National Museum of Health and Medicine (NMHM). These positions also allowed Reed to break free from the fringes of the medical world. In 1896, Reed first distinguished himself as a medical investigator. He proved that yellow fever among enlisted men stationed near the
Potomac River was not a result of drinking the river water. He showed officials that the enlisted men who got yellow fever had a habit of taking trails through the local swampy woods at night. Their fellow officers without yellow fever did not do so. Reed also proved that the local civilians drinking from the Potomac River had no relation to the incidence of the disease. Reed traveled to
Cuba to study diseases in U.S. Army encampments there during the
Spanish–American War. Appointed chairman of a panel formed in 1898 to investigate an epidemic of
typhoid fever, Reed and his colleagues showed that contact with fecal matter and food or drink contaminated by flies caused that epidemic. Yellow fever also became a problem for the Army during this time, felling thousands of soldiers in Cuba. In May 1900, Major Reed returned to Cuba when he was appointed head of an investigative board charged by
Army Surgeon General George Miller Sternberg to study tropical diseases, particularly yellow fever. Sternberg was an early expert in
bacteriology during a time of great advances due to widespread acceptance of the
germ theory of disease and new methods for studying microbial infections. During Reed's leadership of the U.S. Army Yellow Fever Commission in Cuba, the Board demonstrated that yellow fever was transmitted by mosquitoes and disproved the common belief that it was transmitted by
fomites (clothing and bedding soiled by the body fluids and excrement of yellow fever victims). These points were demonstrated in a dramatic series of experiments at the US Army's Camp Lazear, named in November 1900 for Reed's assistant and friend
Jesse William Lazear, who had died of yellow fever while working on the project. This dangerous research was done using human volunteers, including some of the medical personnel, who allowed themselves to be bitten by mosquitos infected with yellow fever. The conclusions from this research were soon applied in Panama, where mosquito eradication was largely responsible for stemming the incidence of yellow fever during the construction of the
Panama Canal. Epidemics of yellow fever in Panama had confounded
French attempts to build a canal across the
Isthmus of Panama only 20 years earlier. Although Reed received much of the credit for "beating" yellow fever, Reed himself credited Cuban medical scientist
Carlos Finlay with identifying a mosquito as the vector of yellow fever and proposing how the disease might be controlled. Reed often cited Finlay in his own articles and gave him credit for the idea in his personal correspondence. The Cuban physician was a persistent advocate of the hypothesis that mosquitos were the vector of yellow fever and correctly identified the species that transmits the disease. His experiments to prove the hypothesis were discounted by many medical experts, but served as the basis for Reed's research. More recently, the politics and
ethics of using medical and military personnel as
research subjects have been questioned. Reed returned from Cuba in 1901, continuing to speak and publish on the topic of yellow fever. In recognition of his research, Reed received honorary degrees from Harvard and the
University of Michigan. In 1902, Reed suffered a ruptured
appendix. He died on November 23, 1902, of the resulting
peritonitis, at age 51. He was buried in
Arlington National Cemetery. ==Legacy==