Abstract
The SARS-CoV-2 pandemic and subsequent interruption of influenza circulation has lowered population immunity to influenza, especially among children with few prepandemic exposures. Using data from a prospective pediatric cohort study based in Managua, Nicaragua, we compared the incidence and severity of influenza A/H3N2 and influenza B/Victoria between 2022 and two prepandemic seasons. We found a higher incidence of A/H3N2 in older children in 2022 compared with pre-2020 and a higher proportion of severe influenza in 2022, primarily among children aged 0-4, suggesting an influence of the SARS-CoV-2 pandemic on influenza incidence and severity in children.
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