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 18, 2013 - North America: in Canada
and the US, most influenza activity indicators were within the
expected level for this time of year. Influenza B remained as
the dominant circulating influenza virus in Canada and the US.
In Mexico, influenza A(H3N2) remained the most prevalent virus.
- Central America and the Caribbean: similar or increasing
respiratory virus activity was reported in this sub-region as
compared to previous weeks. In this sub-region, among influenza
viruses, influenza A(H1N1)pdm09 have been increasing in Cuba and
Dominican Republic in the last weeks. Among other respiratory
viruses, parainfluenza (Cuba, Dominican Republic, Honduras and
Panama) and RSV (Costa Rica) were also reported. - South
America: acute respiratory infe