- Children under 5 years of age - All individuals who have not completed full primary series of Polio vaccination during childhood. There is little to now risk for travelers who are traveling to regions where Polio virus has been eliminated such has: America, Europe, and Western Pacific. The following countries have declared an outbreak of Poliovirus in 2013: Afganistan, Nigeria, Pakistan, Syrian Arab Republic, Cameroon, Kenya, Somalia, Niger, Chad, and Yemen.