Three arms, representing different continents, pushing a red book on a rat with the face of Harry Truman, President of the USA. The book is titled Oppose Germ Warfare. A letter to men and women around the world (「反对细菌战」 告全世界男女书). The rat holds a glass retort with small animals and insects, labelled "American made bacterial organisms"  (美制细菌生物).
The title refers to the meeting of the Executive Committee of the World Peace Council in Oslo, 29 March - 1 April 1952, where a declaration against bacterial warfare was adopted.