Martha Dodray is a health worker in the Kosi River Basin area of Bihar. In order to protect all children against polio, Martha has walked, waded, boated, and rode on motorcycles to reach the communities living spread throughout the area. The region was one of the last to have polio transmission in India, which was certified polio-free in 2014. Kosi River Basin area near Darbhanga, Bihar State, India. November 2017.