Keywords: Cang ying chuan bing = Public health and germ warfare during the Korean War..JPG en The background is a blue sky with some houses at the bottom Flies and bombs are coming down from the sky These bombs represent infectious diseases such as cholera that spread germs and kill people Captions emphasize flies as the vector of infectious diseases that kill people who come into contact with them 2013-09-27 09 14 45 Courtesy of the National Library of Medicine Images from the History of Medicine IHM http //ihm nlm nih gov/images/E00111 Also showcased in the book Hidden Treasure New York NY Blast Books 2012 p 199 HMD Prints Photos call number PP060118 map Zhongguo bu xiang 1952 Custom license marker 2013 09 27 PD-USGov Uploaded with UploadWizard Biological warfare Civil defense Korean War Posters |