♦ National Vaccination Day is observed evary year on March 16 to commemorate the successful launch of the Pulse Polio Immunization Programme in India.

♦ It was in 1995 when the first dose of oral polio vaccination was administered in India on the same date. on March 27, 2014, the World Health Organization (WHO) proclaimed India polio-free.

♦ 2025 theme: "Immunization for All is Humanly Possible."