CDC recommends that all travelers to countries affected by wild (WPV) or circulating vaccine-derived poliovirus (cVDPV) be vaccinated fully against polio. Adults who were fully vaccinated during childhood may receive an additional (single) lifetime booster dose of polio vaccine.
WHO recommends that countries affected by wild poliovirus or cVDPV outbreaks require residents and long-term (4 weeks or more) visitors show proof of polio vaccination before leaving the country. These recommendations are regularly reviewed and updated. Visit CDC’s Travelers’ Health site for current details about country-specific requirements (wwwnc.cdc.gov/travel/).