Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 43 (1 November 2024)

Regional Situation: Influenza-Like Illness (ILI) and Severe Acute Respiratory Infection (SARI) activity has shown a general downward trend in recent weeks, except in North America, where a slight increase in ILI cases has been observed. In this region, most positive cases have been associated with SARS-CoV-2 and, to a lesser extent, influenza. In the Caribbean, Central America, the Andean region, and the Southern Cone, most positive cases have been linked to RSV, SARS-CoV-2, and influenza. SARS-CoV-2 activity remains high in North America and is increasing in Brazil and the Southern Cone. Influenza has shown a general decline, though fluctuations persist in certain Caribbean countries and a slight rise is seen in some Andean and Southern Cone countries. RSV activity has begun to decrease in the Andean subregion and the Southern Cone after reaching epidemic levels in previous weeks. It remains high in some Central American countries and is on the rise in some Caribbean and North American countries.