Brazil reports drop in RSV infections among children under two

Fiocruz’s InfoGripe bulletin shows that the incidence of respiratory syncytial virus (RSV) in children up to two years old has fallen across most of Brazil. The decrease in severe acute respiratory syndrome (SRAG) cases among children under four is mainly driven by fewer hospitalisations for RSV, while a drop among adolescents and adults reflects lower influenza A admissions. Five states – Mato Grosso do Sul, Minas Gerais, Paraná, Santa Catarina and Rio Grande do Sul – still register SRAG incidence at alert or high‑risk levels.

In Campo Grande, severe RSV cases requiring hospitalisation fell 49.6% compared with the same period in 2025, after the city introduced maternal vaccination from the 28th gestational week and administered roughly 1,050 doses of the monoclonal antibody Nirsevimab to premature infants. About 6,700 vaccine doses have been given to pregnant women, a strategy credited with protecting newborns during the highest‑risk months.

The winter season has lifted overall SRAG numbers nationwide, with RSV remaining the leading cause of bronchiolitis in young children. G‑TECH responded by launching a compact home nebuliser aimed at families needing frequent respiratory treatments. Health officials continue to urge basic hygiene, up‑to‑date vaccination and prompt medical care to curb severe outcomes.