India launched the Pulse Polio Immunization (PPI) program in 1995 as a result of World Health Organization's (WHO) Global Polio Eradication Initiative. Under this programme, all children under 5 years are given 2 doses of Oral Polio Vaccine (OPV) in December and January every year until polio is eradicated.
PPI was initiated with the objective of achieving hundred percent coverage under OPV. It aims to reach the unreached children through improved social mobilization, plan mop-up operations in areas where poliovirus has almost disappeared and maintain high level of morale among the public.