Victoria, Seychelles, 17 April 2016 - will remain an important date in the history of immunisation in Seychelles. This is because April 17th was Seychelles national ‘Switch’ date, where the country ceased the use of all trivalent oral polio vaccine (tOPV) and started using bivalent oral polio vaccine (bOPV). Following Rwanda, Seychelles became the second country in Africa to ‘switch’.