What Nobel category have Americans received the most prizes in ?
Four Nobel Prizes were shared by Washington University laureates ; Joseph Erlanger and Herbert Spencer Gasser won the 1944 Nobel Prize in Physiology or Medicine , Carl Ferdinand Cori and wife Gerty Cori won the 1947 Nobel Prize in Physiology or Medicine , Arthur Kornberg and Severo Ochoa won the 1959 Nobel Prize in Physiology or Medicine , and Daniel Nathans and George Davis Snell won the 1980 Nobel Prize in Physiology or Medicine .