• Evidence for persistence of infectious agents in isolated human populations 

      Black, Francis Lee; Hierholzer, Walter J; Pinheiro Filho, Francisco de Paula; Evans, Alfred S; Woodall, John P; Opton, Edward M; Emmons, Jean E; West, Bernice S; Edsall, Geoffrey; Downs, Wilbur G; Wallace, Gordon D (Oxford University Press, 1974)
      More than 900 members of three Carib and four Kayapo Indian tribes, living on the periphery of the Amazon basin, have been studied for immunity to various viral, bacterial and protozoal agents. These tribes are isolated ...