"Frame 25 - Contagious and deficiency diseases were foreseen, and some of them occurred. One of the problems to be solved was the persuading of these backward country folk to accept the prophylactic measures recommended. In one camp a catching game was played; the children who caught were treated first. In another camp, the choice candied red-fruit-on-sticks (Vitamin C) were reserved until after the not-nearly-so-choice cod liver oil (Vitamins A and D) had been administered. Here you see the technique of cod-liver-oiling your camp without contaminating your one and only spoon. Efforts were made to provide vegetables also." A health worker wearing a mask to cover their mouth and nose is holding a spoon with fish oil in it by the open mouth of a Chinese girl. And older man stands with the girl and looks at the camera, along with the other folk nearby.