Rasheed, A. M.; Matloob, S. the Effect of 23- Valent Pneumococcal Polysaccharide Vaccine on Pharyngeal Colonization in Healthy Children under 5 Years of Age. J Fac Med Baghdad 2007, 49 (3), 359-361. https://doi.org/10.32007/jfacmedbagdad.4931370.