This is a viral disease which is being controlled throughout the world by massive vaccination programmes. The global incidence of this disease is dropping significantly and WHO hopes to be able to declare a world free of polio by the year 2005. There are two main vaccines used against this disease both of which work very well. The Sabin version is given as drops (sometimes on a sugar cube to hide the bitter taste) and the Salk version is given by injection. There is a mild risk when the oral version is used that contacts of the vaccinated person may become exposed through faecal exposure. The virus may be excreted in faecal matter for at least 6 weeks following vaccination and so extra care is required to ensure that contamination risk is contained.