Table 1.

Epidemiological and vaccination characteristics of meningococcal disease in Argentina, Brazil, Chile, and Uruguay during the period 2010–2021.

	Argentina	Brazil	Chile	Uruguay
Median Incidence (IQR)/100,000 inhabitants
2010–2021	0.37 (0.20–0.61)	0.59 (0.54–1.22)	0.45 (0.4–0.77)	0.47 (0.33–0.69)
2010–2019	0.41 (0.31–0.62)	0.72 (0.55–1.32)	0.55 (0.40–0.80)	0.58 (0.40–0.73)
Incidence reduction during pandemic a	87.9%	76.3%	94.5%	72.6%
Disease burden	Infants Children 1–4 yoa	Infants Children 1–4 yoa and young adults	Infants Children 1–4 yoa and >60 yoa	Infants Children 1–4 yoa
Serogroup (predominance)	W + B	C + B	W + B	B
Carriage (%) (adolescents)	9.4	9.9–12.5	6.5	N/A
Case fatality rate (Median %)	9	21	19.9	17.9

^a Pandemic impact was estimated comparing periods 2010–2019 versus 2020: 100 × ((Median 2010–2019) − 2020)/(Median 2010–2019)).