Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 32 (15 August 2025)

Regional Situation: Influenza activity in the Americas continues to decline. SARS-CoV-2 activity remains low and stable. At the regional level, RSV circulation shows an upward trend. In North America, influenza activity remains at interseasonal levels. In the Caribbean, circulation is decreasing, with a positivity rate of 11.8%. Subtype A(H1N1)pdm09 continues to be predominant. RSV activity remains low and stable in North America, while in the Caribbean it reached a positivity rate of 6.7%, remaining at moderate levels in the latest epidemiological week (EW). SARS-CoV-2 activity is increasing in North America and the Caribbean, where positivity reached 4.7% and 20%, respectively. In Central America, influenza activity remains elevated but shows a downward trend, with a positivity rate of 9.8%. SARS-CoV-2 and RSV activity decreased this week, with positivity rates of 6.9% and 9.3% for RSV, respectively. In the Andean subregion, influenza A activity continues its downward trend, with a positivity rate of 6.8%. RSV activity remains high but is trending downward, with a positivity rate of 8.6%, while SARS-CoV-2 circulation has slightly increased compared to the previous EW. In Brazil and the Southern Cone, influenza activity continues to decline, with a positivity rate of 3.4%. RSV circulation increased compared to the previous EW, reaching a positivity rate of 14.6%, while SARS-CoV-2 activity remains at low levels.