Polio vaccination travel requirements map.
LegendPolio vaccination is required for travellers...

  From all countries, to all countries
  From some countries, to all countries
  From some countries, to all countries
  From some countries, to some countries
  To some countries
  From some countries
OverviewPolio vaccination is required for travellers...

From all countries, to all countries (by Pakistan)
From some countries, to all countries (by Afghanistan)
From some countries, to all countries (by Syria)
From some countries, to some countries (by Belize, Iraq, Maldives, Philippines)
To some countries (by Ukraine)
From some countries (by Brunei, Egypt, Georgia, India, Iran, Jordan, Lebanon, Libya, Morocco, Nepal, Oman, Qatar, Saudi Arabia, Seychelles)
Own work. Sources used in creating this map:

International Travel and Health. Chapter 6 - Vaccine-preventable diseases and vaccines (2019 update). World Health Organization. United Nations (2020). Retrieved on 3 December 2020.
Countries with risk of yellow fever transmission and countries requiring yellow fever vaccination (July 2019). World Health Organization. United Nations (4 July 2019). Retrieved on 3 December 2020.
All country data from the country entries on iamat.org (International Association for Medical Assistance to Travellers).
Nederlandse Leeuw