In April 2014 a World Health Organization (WHO) Emergency Committee met in order to discuss the transmission of wild polio viruses internationally. Countries currently infected with wild polio viruses and with potential risk of international spread include Afghanistan, Nigeria and Pakistan. According to the International Health regulations the transmission of polio viruses was declared as a Public Health Emergency of International Concern (PHEIC) and a decision about the implementation of temporary measures has been made. The WHO Emergency Committee regularly reviews the temporary recommendations every 3 months.
WHO recommend that travelers to countries considered at potential risk of international spread of polio, receive and show proof of polio vaccination within the past 12 months. According to WHO statement this applies to all travelers spending over 4 weeks in the affected country.
Taking this into consideration:
Travelers to a country infected with wild polio virus are advised to have their polio vaccination documented on the International Certificate of Vaccination or Prophylaxis (ICVP). For other travelers, it should be sufficient to have this recorded in an appropriate document, for example a stamped vaccination booklet or headed notepaper from the clinic.