This poster is part of a series with the title "Everybody joins the patriotic hygienic campaign to prevent epidemics, Thoroughly defeat the germ warfare of American imperialism, " (彻底打散美帝国主义的细菌战,人人都来参加爱国防疫运动). The slogan on the right-hand side (人人都来参加爱国防病卫生运动) has been cropped.
General advice about maintaining an hygienic environment in public places.