Weekly update, Influenza. Epidemiological week 31 (August 19, 2022)

North America:  Overall, influenza activity decreased in the subregion while SARS-CoV-2 continued elevated. In Mexico, influenza activity decreased, while SARS‑CoV-2 positivity continued elevated and SARI activity remained at moderate- intensity levels. In the United States influenza activity was low, with the predominance of influenza A(H3N2) virus, while SARS‑CoV-2 activity increased.

Caribbean:  Overall, influenza activity remained low, with the predominance of influenza A(H3N2). In Belize, influenza positivity remained elevated. The Dominican Republic and Haiti reported increased SARS-CoV-2 activity, with increased SARI activity in Haiti, with levels above average for this time of year. 

Central America: Overall, influenza activity continued to decrease, with the predominance of influenza A(H3N2). In Nicaragua and Panama, influenza activity increased to moderate and low-intensity levels. SARS-CoV-2 activity rose across the subregion, with increased levels in Guatemala and Honduras. 

Andean Countries:  Overall, influenza activity remained low, with A(H3N2) predominance. SARS-CoV-2 activity continued to increase in Bolivia, Ecuador, and Peru.

Brazil and Southern Cone:  Overall, influenza activity remained low with influenza A(H3N2) predominance and was driven by its circulation in Chile. SARS-CoV-2 activity has decreased throughout the subregion, although it still increased in Chile and Argentine. In Uruguay, SARI activity was elevated above epidemic levels for the period, and RSV predominated.