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The information presented in this update is based on data provided by Ministries of Health and National Influenza Centers of Member States to the Pan American Health Organization (PAHO) or from updates on the Member States’ Ministry of Health web pages.

Regional Update EW 10
, 2015
    • North America: Influenza activity continued to decrease but remained elevated. In Canada, ILI activity decreased and was within expected levels. This week three regions reported widespread influenza/ILI activity. Influenza A detections continued to decrease (6.6% positivity) while influenza B detections (10% positivity) continued to increase. Influenza A(H3N2) predominated this season and RSV activity remains high, but detections continued to decrease. Influenza hospitalizations continued to decrease and the highest numbers of hospitalizations and deaths were recorded among those aged ≥65 years. In the United States, ILI activity (2.3%) continued to decrease but remained above the national baseline of 2% and this week, and seven states reported widespread influenza activity. Influenza detections (11.2% positivity) continued to decrease and during EW 10 67% of all influenza positive specimens were influenza B. Influenza A (not subtyped), influenza A(H3) and influenza B predominated, and RSV activity remained at a high level. Influenza-associated hospitalization rates among adults aged ≥65 years continued at high levels and the proportion of pneumonia and influenza mortality continued above the epidemic threshold. In Mexico, ARI and pneumonia activity remained at high levels, while influenza detections continued to decrease. Influenza A(H3N2) predominated among circulating influenza viruses with 24.3% influenza positivity reported during EW 11.

       Caribbean: Respiratory virus activity is at a high level in Puerto Rico, Jamaica and the French departments in the Americas. In Puerto Rico, influenza activity remained high but detections continued to decrease. Active circulation of influenza A(H3N2) and influenza B was reported in Jamaica and ILI activity remained elevated in French Guyane, Guadeloupe, Martinique, Saint Barthélémy and Saint-Martin with influenza A(H3N2), with influenza B predominating.
       Central America: Respiratory virus activity remained low and ARI/SARI activity continued within expected levels. Some influenza detections, mainly influenza A(H3N2) and influenza A (not subtyped), were reported recently in Guatemala. Regarding other respiratory viruses, RSV predominated in the other countries with sustained circulation at low levels.
       Andean Sub-region: Respiratory virus activity remained low and ARI/SARI activity continued within expected levels. High RSV activity continued in Ecuador and in Colombia, and sustained co-circulation of influenza A(H3N2), influenza A(H1N1)pdm09 and influenza B were reported.
       Southern Cone: Influenza activity remained at inter-seasonal levels and ARI/SARI and other respiratory virus activity remained at low levels. In Paraguay, ILI activity increased in recent weeks associated with increased detections of RSV.

Read the full Influenza Report - EW 10

Last Updated on Wednesday, 25 March 2015 10:21
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