What Nobel category have Americans received the most prizes in ?
Four Nobel Prizes were shared by Johns Hopkins laureates : George Minot and George Whipple won the 1934 Nobel Prize in Physiology or Medicine , Joseph Erlanger and Herbert Spencer Gasser won the 1944 Nobel Prize in Physiology in Medicine , Daniel Nathans and Hamilton O. Smith won the 1978 Nobel Prize in Physiology or Medicine , and David H. Hubel and Torsten N. Wiesel won the 1981 Nobel Prize in Physiology or Medicine .