Malcheva, M. (2019). STREPTOCOCCUS PNEUMONIAE SEROTYPE DISTRIBUTION AFTER THE INTRODUCTION OF PNEUMOCOCCAL CONJUGATE VACCINES: REVIEW. PROBLEMS of Infectious and Parasitic Diseases, 47(1), 5–8. Retrieved from https://pipd.ncipd.org/index.php/pipd/article/view/47_1_1_STREPTOCOCCUS_PNEUMONIAE_SEROTYPE_DISTRIBUTION_AFTER_THE_