Abishek Choudhary, of the Rotaract Club of Birgunj, Nepal, holds a baby, while Rotarian Om Prakash Sikaria administers polio vaccine during a subnational polio immunization day. Border towns with little regulation like Birgunj create high risk of the spread of the poliovirus. Subnational immunization days take place more often than larger annual events and target strategic locations based on research by Rotary’s polio eradication partners, the World Health Organization, UNICEF, and the U.S. Centers for Disease Control.