be found together at an event in Deerlijk (Belgium) in 1933. Their relationship still needed to remain a secret, because co-habitation was considered the same as marriage under the ARAR. From 1937-1950 she was chairman of the Medical Women's International Association. From 1947-1951 she was on the . During a trip to the USA she was involved in discussions about biological warfare, to which she was opposed. From 1949-1953 she was chairman of the medical faculty. She refused a request by the ministry of war to build a biological warfare laboratory and spoke out about it in February 1958. Ruys died in Amsterdam. Works Publications by Ruys include: De verwekker der rattenbeetziekten, PhD thesis, 1925 Wisselende opvatting over besmetting, 1928 De hygiëne van voeding, woning en kleeding, 1934 Ziektekiemen, 1940 Prof. dr. J.J. van Loghem, 1916-1941 : 25th Anniversary of the inauguration of van Loghem as a professor at the University of Amsterdam, 1941 Bacteriological and Epidemiological Data on Typhoid Fever in Amsterdam, 1948 The Diphtheria Epidemic in Amsterdam, 1949 Human, rights : the task before us. Les droits de l'homme : notre tache, 1951 Ali-esterase inhibitors and growth, 1953 Leerboek Microbiologie en Immunologie - Voor artsen en studenten in de geneeskunde., editor, 8 volume textbook, Uitg. N.V.A. Oosthoek, 1950 (2nd edition 1953) Keerzijden van vooruitgang, 1959 Verzet van vandaag, speech at awards ceremony on 18 February 1956 for two yearly prizes given by the Stichting Kunstenaarsverzet 1942-1945, Stedelijk Museum Amsterdam, (bundel of speeches published in 1961) The medical profession'', 1968 References External links Anna Charlotte Ruys in KNAW 1898 births 1977 deaths People from Hardenberg Dutch bacteriologists Dutch women scientists Dutch women physicians