The story of global conflict is all the more powerful when it isn’t seen in black and white. Artist Marina Amaral explains her latest work

On a stretcher lies a patient; his ashen face protrudes from under a green blanket, eyes closed. Two uniformed women carry the stretcher, wearing face masks. It looks as if it’s a lovely day: the sun is shining, the shadows dark, the sky blue. But this is not a happy picture. Is the casualty even alive, or has he already been taken by the killer virus that has wrapped itself around our planet like a python, squeezing the life from it?

The photograph was taken at an ambulance station in Washington DC. Within the past couple of months? It could have been, if it weren’t for the uniforms (I don’t think today’s nurses wear lace-up leather boots) and the stretcher. In fact, it was taken more than a century ago, in 1918, during the Spanish flu epidemic, which killed so many millions. The photographer is unknown, forgotten. But the black and white picture was recently “colourised” by Marina Amaral.