Celebrated on March 16th, National Vaccination Day, also recognized as National Immunization Day or Polio Ravivar, strives to endorse vaccination initiatives and heighten awareness regarding the pivotal role vaccines play in averting infectious diseases.

Initiated in 1995 under the National Polio Eradication Program (NPEP), National Vaccination Day holds historical significance. The conclusive report of a Polio case in Howrah, West Bengal, in 2011 marked a crucial milestone, leading to India's declaration as Polio-free by the World Health Organization on March 27, 2014.