Pulse polio immunisation programme was launched in 1995-1996 with an aim
to eradicate polio disease from the world. It involves simultaneous
administration of polio drops (polio vaccine) to whole of the high
risk population (i.e., children under three years of age) on a single
day throughout the nation. In this programme, 2 doses of vaccine are
given 4-6 weeks apart. The prefixed days, on which pulse polio
immunisation is to be carried out throughout the country, are called
National Immunisation Days. In 1996-1997, the target age group was
increased to all children under 5 years of age.