Yellow fever: section of a kidney of a patient infected with yellow fever. Watercolour, 1900/1930 . https://www.rawpixel.com/image/13963597/image-art-pattern-watercolourFree Image from public domain licenseMosquito breeding ground in a hole in a tree trunk: museum exhibit. Photograph, 1900/1930. https://www.rawpixel.com/image/14013821/photo-image-plant-person-treeFree Image from public domain licenseYellow fever: section of the large intestine of a patient infected with yellow fever. Watercolour, 1900/1930 . https://www.rawpixel.com/image/13979845/image-person-art-watercolourFree Image from public domain licenseBarranquilla, Colombia: a water filter attached to a tap at the Yellow Fever Campaign office. Photograph, 1900/1930. https://www.rawpixel.com/image/13998232/photo-image-water-clothing-public-domainFree Image from public domain licenseBoys with Surf Boards Indulging in Their Famous Native Sport on Beach at Waikiki, near Honolulu, Hawaii. by Keystone View Co https://www.rawpixel.com/image/14295525/photo-image-person-art-oceanFree Image from public domain license