Philip S. Hench Walter Reed Yellow Fever Collection"...is a compilation of several distinct manuscript collections housed in different libraries. This extensive on-line archive comprises correspondence, notes, reports, printed materials, photographs, negatives, and artifacts spanning a period of almost one hundred years. The core of the on-line archive is the Philip S. Hench Walter Reed Yellow Fever Collection, a monumental array of items occupying seventy-two linear feet of shelf space and 147 boxes in the Department of Historical Collections and Services, The Claude Moore Health Sciences Library, University of Virginia. Additional material from The Claude Moore Health Sciences Library includes selected items from the Henry Rose Carter Papers, the William Bennett Bean Papers, and the Wade Hampton Frost Papers. The Albert and Shirley Small Special Collections Library of the University of Virginia houses the important and equally extensive Jefferson Randolph Kean Papers, many of which are included here. A small but significant deposit of Walter Reed's letters are held at the Library of Virginia, Richmond, Virginia. Finally, the many government documents reproduced here as photostats derive from originals in the National Archives and Records Administration in Washington, D. C. The Hench Reed on-line archive presents a series of complex and interrelated stories, all linked to the U. S. Army Yellow Fever Commission's demonstration in 1900 that the mosquito Aedes aegypti is the vector for the transmission of yellow fever."