Illustration of Hansen’s disease, better known as leprosy. It is caused by a long-term infection with mycobacterium leprae. Hansen’s disease causes nerve damage, meaning that people experience repeated injury and infection to their extremities, leading to reabsorption - marked by shortening or loss - of their fingers and toes. Hansen’s disease has a horrible history of stigmatisation, despite not being a very contagious disease, and is easily treated today. Unsurprisingly it is a neglected tropical disease - and predominantly impacts people in India, Brazil and Indonesia