Overview
- Health agencies and clinicians report local transmission of influenza A H3N2 in multiple Latin American countries, including confirmed circulation in Argentina and new detections in Mexico and Peru.
- Specialists identify annual vaccination as the most effective defense, prioritizing infants, older adults, pregnant people, and those with chronic heart or lung disease, immunosuppression, or obesity.
- Argentina is reported to face vaccine supply gaps, with experts warning that influenza doses may need to be purchased abroad, potentially constraining broader rollout.
- Public‑health guidance for gatherings emphasizes frequent hand hygiene, ventilation of indoor spaces, covering coughs, and mask use in crowded settings or when respiratory symptoms are present.
- People with cough, fever, sore throat, or breathing difficulty are advised to stay home and seek care if symptoms worsen, as an earlier and larger influenza season is considered likely.