American Academy of Microbiology (Fellow) American Association for the Advancement of Science (Fellow) American Association for Cancer Research American Association of Immunologists(a) Committee for Congressional Liaison for HEW Appropriations
(b) Long-Range Planning Committee
American College of Occupational and Environmental Medicine American Federation for Clinical Research American Rheumatism Association American Society for Clinical Investigation, Member 1960-75(a) Emeritus Member 1976
(b) Chairman, Committee on Public Information 1971-74
American Society of Hematology 1970(a) President, subdiv. of Immunohematology and Immunogenetics 1974
(b) Subcommittee on Research in Teaching Methods 1961-65
American Society for Human Genetics(a) Member, Executive Council 1969-72
Association of American Medical School Microbiology Chairmen 1975-83(a) Member, Public Affairs Committee
Association of American Physicians 1968- Council of Biology Editors 1978-87 Genetics Society of America 1962-70 Hungarian Society for Immunology (Honorary Member) International Platform Association 1991- International Society for Blood Transfusion (Member, Executive Council) 1965-71 International Society for Environmental Toxicology and Cancer(a) Board of Councilors 1984-88
International Society of Hematology 1958-87 Internat'l Union of Immunological Societies, Immunoglobulin Subcommittee 1977 Midwinter Conference of Immunologists (Founder and Past President) Molecular Medicine Society 1996- Netherlands Society for Immunology (Honorary Member) 1972-82 New York Academy of Sciences 1978-92 Oxford Club 1996- Reticuloendothelial Society, Member 1975-82(a) Program Chairman 1978
(b) Chairman, Public Affairs Committee 1978-81
Royal Society of Medicine (Associate Member), England 1974-82 Sigma XI 1978-82 South Carolina Society for Autistic Children 1976-80 Southeast Cancer Research Association 1975-79 Southeast Cancer Research Association, President 1977-78 Transfer Factor Society 1996- Transplantation Society 1979-85 Turkish Society of Immunology (Honorary Member) 1980-