Nayak R, Kumar Singh A, Pragyan Parida S, Padhy S, Mishra KG. Introduction of pneumococcal vaccine in national immunisation schedule in India: boon or bane?. Public Health Rev: Int J Public Health Res [Internet]. 2019Dec.31 [cited 2024Nov.23];6(6):239-45. Available from: https://publichealth.medresearch.in/index.php/ijphr/article/view/122