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. 2023 Dec 12;11(12):1841. doi: 10.3390/vaccines11121841

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Percentage distribution of serogroups in cases of meningococcal disease by year in Argentina (A), Brazil (B), Chile (C), and Uruguay (D), 2010–2021. The year of introduction of meningococcal conjugated vaccine (MCV) into National Immunization Programs at determined ages is pointed out for each country; m = months of age, and y = years of age. “Others” include non-BCWY serogroups, non-serogroupable, and unknowns. No cases due to MenA were reported in Argentina, Brazil, Chile, or Uruguay during the period.