 Saint Vincent and the Grenadines signed a mutual visa waiver agreement with Schengen Area countries on 28 May 2015.Many African countries, including Angola, Benin, Burkina Faso, Cameroon, Central African Republic, Chad, Democratic Republic of the Congo, Republic of the Congo, Côte d'Ivoire, Equatorial Guinea, Gabon, Ghana, Guinea, Liberia, Mali, Mauritania, Niger, Rwanda, São Tomé and Príncipe, Senegal, Sierra Leone, Uganda, Zambia require all incoming passengers to have a current International Certificate of Vaccination.Some other countries require vaccination only if the passenger is coming from an infected area.