Nayak, Ranjeeta, Arvind Kumar Singh, Swayam Pragyan Parida, Sarmistha Padhy, and Kumar Guru Mishra. 2019. “Introduction of Pneumococcal Vaccine in National Immunisation Schedule in India: Boon or Bane?”. Public Health Review: International Journal of Public Health Research 6 (6), 239-45. https://doi.org/10.17511/ijphr.2019.i6.05.