Due to pressure from numerous accounts of the bio-warfare attacks, [[Chiang Kai-shek]] sent a delegation of army and foreign medical personnel in November 1941 to document evidence and treat the afflicted. A report on the Japanese use of plague-infested fleas on Changde was made widely available the following year, but was not addressed by the Allied Powers until [[Franklin D. Roosevelt]] issued a public warning in 1943 condemning the attacks.<ref>{{Cite web|title=Biohazard: Unit 731 and the American Cover-Up (Page 5)|url=https://www.umflint.edu/sites/default/files/groups/Research_and_Sponsored_Programs/MOM/b.altheide.pdf|website=[[University of Michigan–Flint]]}}</ref><ref>{{Cite journal|last=Guillemin|first=Jeanne|date=2017|editor-last=Friedrich|editor-first=Bretislav|editor2-last=Hoffmann|editor2-first=Dieter|editor3-last=Renn|editor3-first=Jürgen|editor4-last=Schmaltz|editor4-first=Florian|editor5-last=Wolf|editor5-first=Martin|title=The 1925 Geneva Protocol: China's CBW Charges Against Japan at the Tokyo War Crimes Tribunal|journal=One Hundred Years of Chemical Warfare: Research, Deployment, Consequences|language=en|publisher=Springer International Publishing|pages=273–286|doi=10.1007/978-3-319-51664-6_15|isbn=9783319516646|doi-access=free}}</ref> | Due to pressure from numerous accounts of the bio-warfare attacks, [[Chiang Kai-shek]] sent a delegation of army and foreign medical personnel in November 1941 to document evidence and treat the afflicted. A report on the Japanese use of plague-infested fleas on Changde was made widely available the following year, but was not addressed by the Allied Powers until [[Franklin D. Roosevelt]] issued a public warning in 1943 condemning the attacks.<ref>{{Cite web|title=Biohazard: Unit 731 and the American Cover-Up (Page 5)|url=https://www.umflint.edu/sites/default/files/groups/Research_and_Sponsored_Programs/MOM/b.altheide.pdf|website=[[University of Michigan–Flint]]}}</ref><ref>{{Cite journal|last=Guillemin|first=Jeanne|date=2017|editor-last=Friedrich|editor-first=Bretislav|editor2-last=Hoffmann|editor2-first=Dieter|editor3-last=Renn|editor3-first=Jürgen|editor4-last=Schmaltz|editor4-first=Florian|editor5-last=Wolf|editor5-first=Martin|title=The 1925 Geneva Protocol: China's CBW Charges Against Japan at the Tokyo War Crimes Tribunal|journal=One Hundred Years of Chemical Warfare: Research, Deployment, Consequences|language=en|publisher=Springer International Publishing|pages=273–286|doi=10.1007/978-3-319-51664-6_15|isbn=9783319516646|doi-access=free}}</ref> |