Seasonal Flu: International Situation Update

Global Flu Activity Update

July 12, 2012

The following summary of key influenza-related updates is based upon regional World Health Organization (WHO) reports, country reports, CDC field staff updates and other sources. Updates are listed by region. Reporting weeks may vary by country.

Southern Temperate Region

• Activity: low, but increases have been reported from a number of countries in recent weeks as the region is moving into its influenza season

Chile

• Activity: increased steadily since the beginning of May
• Virology: influenza A (H3N2) viruses have predominated
• Source: WHO

Paraguay

• Activity: increased since the beginning of May
• Virology: influenza A (H1N1)pdm09 viruses have predominated
• Source: WHO

Australia

• Activity: increased steadily beginning in early June
• Virology: mix of influenza A (H3N2) and influenza B viruses
• Source: WHO

South Africa

• Activity: increased in recent weeks
• Virology: mix of influenza A (H3N2) and influenza B viruses
• Source: WHO

New Zealand

• Activity: increased in June
• Virology: in June, a mix of influenza A (H1N1)pdm09, influenza A (H3N2), and influenza B viruses
• Source: WHO

Tropical Region

• Activity: high or increasing in some tropical countries
• Source: WHO

El Salvador

• Activity: increased sharply at the end of May and throughout June
• Virology: influenza A (H1N1)pdm09 viruses have predominated
• Source: WHO PAHO

Northern Temperate Region

• Activity: mostly low. The region’s influenza season is over.
• Sources: WHO