 Dr. Walter Reed, a U.S. Army physician, was commemorated on the 5-cent Famous American Scientists stamp issued April 17, 1940.He made a specialty in contagious and infectious diseases, most notably linking flies to the spread of typhoid fever and mosquitoes to the spread of yellow fever.Richard E. Byrd's Byrd Antarctic Expedition II was commemorated on a 3-cent stamp the same size and shape as Special Delivery on September 22, 1933.