Regional Update, Influenza. Epidemiological Week 26 (13 July 2022)

Regional Update, Influenza. Epidemiological Week 26 (13 July 2022)

North America: Overall, influenza activity decreased in the subregion, while SARS-CoV-2 continued to rise. In Mexico, influenza activity with A(H3N2) virus predominance decreased, and SARS-CoV-2 positivity continued to increase; ILI and SARI activity remained at moderate intensity levels. In the United States, influenza activity was low, with influenza A(H3N2) viruses predominating. In addition, RSV and SARS-CoV-2 activity increased with higher COVID-19-associated hospitalizations.

Caribbean: Influenza activity remained very low, with the influenza A(H3N2) virus predominance. However, Belize, the Dominican Republic, and Haiti reported increased SARS-CoV-2 activity, with increased SARI cases for this time of year in the last one. In addition, in the Dominican Republic, RSV activity remained elevated at levels seen in the pre-pandemic period.

Central America: Influenza activity appeared to decrease in the subregion, influenza A(H3N2) virus predominated. In El Salvador and Nicaragua, influenza activity continued elevated, with the A(H3N2) virus predominance. SARS-CoV-2 activity remained moderate and rising across the subregion. Influenza and SARS-CoV-2-associated ILI counts remained at moderate levels in Guatemala.

Andean Countries: Influenza activity remained low with A(H3N2) predominance and circulation above epidemic levels in Bolivia. However, in Colombia and Peru, SARS-CoV-2 activity continued to increase. In Bolivia, SARI activity remained elevated to epidemic levels and was associated with the co-circulation of influenza, SARS-CoV-2, and RSV.

Brazil and Southern Cone: Overall, influenza activity remained at moderate levels; influenza A(H3N2) prevailed. At moderate levels, SARS-CoV‐2 activity continued to increase throughout the subregion. Chile, Paraguay, and Uruguay reported elevated SARI activity above the average expected at this time of year, with RSV and SARS-CoV-2 predominance in Chile and Paraguay, while influenza and SARS-CoV-2 predominated in Uruguay.