Africa: three women carrying babies on their backs in fabric slings. Photograph by Dudley Kidd, 1910/1930. https://www.rawpixel.com/image/13951610/photo-image-people-fabric-skyFree Image from public domain licenseYellow fever: two scientists wearing face masks at work in a laboratory. Photograph, 1910/1930 . https://www.rawpixel.com/image/13952598/photo-image-face-person-hospitalFree Image from public domain licenseYellow fever: two scientists wearing face masks at work in a laboratory. Photograph, 1910/1930 . https://www.rawpixel.com/image/13957532/photo-image-face-person-hospitalFree Image from public domain licenseIvory Coast: a boy with a handmade scooter. Photograph, 1910/1930 . https://www.rawpixel.com/image/14018128/ivory-coast-boy-with-handmade-scooter-photograph-19101930Free Image from public domain licenseThe Kalar-Azar Commission Camp field laboratory, Golaghat, Assam, India: a small, white boy in a large hat stands at the… https://www.rawpixel.com/image/14002260/photo-image-background-plant-personFree Image from public domain licenseA parade of health professionals bearing vaccination syringes, drugs and banners, lined on each side by their victims'… https://www.rawpixel.com/image/14020746/image-horse-cartoon-personFree Image from public domain licensePlant cell structure . Drawing by Gustave Chauveaud, 1910/1930 . https://www.rawpixel.com/image/13998883/plant-cell-structure-drawing-gustave-chauveaud-19101930Free Image from public domain licenseYellow fever: a scientist wearing a face mask works at a laboratory bench with bunsen burners and microscopes. Photograph… https://www.rawpixel.com/image/13982592/photo-image-face-person-clothingFree Image from public domain licenseSwazi witchdoctors wearing animal skins and jewellery. Photograph, 1910/1930. https://www.rawpixel.com/image/13972017/swazi-witchdoctors-wearing-animal-skins-and-jewellery-photograph-19101930Free Image from public domain licenseColonial Hospital, Port of Spain, Trinidad: exterior. Photograph, 1910/1930 . https://www.rawpixel.com/image/13971925/colonial-hospital-port-spain-trinidad-exterior-photograph-19101930Free Image from public domain licenseFumigating a building (to destroy typhus-carrying lice ) with the Clayton Type B machine, England . Photograph, 1910/1930. https://www.rawpixel.com/image/14014207/photo-image-person-clothing-roadFree Image from public domain licenseYellow fever: laboratory equipment. Photograph, 1910/1930 . https://www.rawpixel.com/image/14017958/yellow-fever-laboratory-equipment-photograph-19101930Free Image from public domain licenseYellow fever: laboratory equipment. Photographs, 1910/1930 . https://www.rawpixel.com/image/13995352/yellow-fever-laboratory-equipment-photographs-19101930Free Image from public domain licenseA man (a Buddhist monk) sitting cross-legged wearing robes and beads and holding a bell. Photograph, 1910/1930. https://www.rawpixel.com/image/13996553/photo-image-plant-person-crossFree Image from public domain licenseAn eye hospital , Trinidad: a ward with two nuns. Photograph, 1910/1930 . https://www.rawpixel.com/image/13974892/eye-hospital-trinidad-ward-with-two-nuns-photograph-19101930Free Image from public domain licenseMauritius: a wooden, triangular isolation hut for plague (and other infectious diseases) quarantine. Photograph, 1910/1930. https://www.rawpixel.com/image/14014310/photo-image-plant-tree-woodenFree Image from public domain licenseCeylon, India: a shaman holding a large bow for a divination ritual. Process print, 1910/1930. https://www.rawpixel.com/image/14013770/image-face-person-manFree Image from public domain license