I- Evolution of the pandemic

North America

Widespread influenza activity and increased trends in acute respiratory disease continued this week.

In Canada, the national influenza-like illness (ILI) consultation rate increased again relative to the last week and remained above average for the fourth consecutive week. There was a

I- Evolution of the pandemic

North America

In Canada and the United States, spread of influenza continues to be widespread and trends of acute respiratory disease continue to increase.

In the United States, in EW 41, outpatient influenza-like-illness (ILI) activity continued to increase, remaining

- 8,869 new confirmed cases (146,016 cumulative cases in 35 countries).

- 158 new confirmed deaths (3,292 confirmed deaths in 25 countries).

- 98.9% of the influenza A viruses that were subtyped were pandemic (H1N1) 2009.

- South America experienced low intensity and a decrease or unchanged trend

- North America experienced an increasing trend despite low intensity of acute respiratory disease everywhere except for Mexico

- Central America experienced low or moderate intensity and a decreasing trend.

An analysis of the very latest, peer-reviewed science indicates that many predictions at the upper end of the IPCC's forecasts are becoming ever more likely.

Meanwhile, the newly emerging science points to some events thought likely to occur in longer-term time horizons, as already happening or set to happen far sooner than had previously been thought.

The qualitative indicators for surveillance of the Pandemic (H1N1) 2009 are described in Table 3 of this report. The information presented herein has been obtained through the official sites

The qualitative indicators for surveillance of the Pandemic (H1N1) 2009 are described in Table 3 of this report. The information presented herein has been obtained through the official sites

The information presented herein has been obtained through the official sites of the Ministries of Health of the countries in the Region as well as official reports submitted by the

The qualitative indicators for surveillance of the Pandemic (H1N1) 2009 are described in Table 3 of this report. The information presented herein has been obtained through the official sites

This report was prepared based on the indicators in the document Human infection with pandemic (H1N1) 2009 virus: updated interim WHO guidance on global surveillance available at: