Immunization has been a resounding success in India over the past few decades, owing to the concerted efforts of the government, healthcare professionals, and other stakeholders. The country's immunization program, one of the largest in the world, has significantly reduced morbidity and mortality due to vaccine-preventable diseases. Immunization has been a resounding success in India over the past few decades, owing to the concerted efforts of the government, healthcare professionals, and other stakeholders. The country's immunization program, one of the largest in the world, has significantly reduced morbidity and mortality due to vaccine-preventable diseases.