In the 2009 revision of the phase descriptions, WHO has retained the use of a six-phased approach for easy incorporation of new recommendations and approaches into existing national preparedness and response plans. The grouping and description of pandemic phases have been revised to make them easier to understand, more precise, and based upon observable phenomena. Phases 1–3 correlate with preparedness, including capacity development and response planning activities, while Phases 4–6 clearly signal the need for response and mitigation efforts. Furthermore, periods after the first pandemic wave are elaborated to facilitate post pandemic recovery activities.

The current WHO phase of pandemic alert is 5

Influenza A(H1N1) – update 21

8 May 2009 — As of 06:00 GMT, 8 May 2009, 24 countries have officially reported 2384 cases of influenza A (H1N1) infection.

1. Mexico has reported 1.112 laboratory confirmed human cases of infection, including 42 deaths.

2. The United States has reported 896 laboratory confirmed human cases, including two deaths.

The following countries have reported laboratory confirmed cases with no deaths

3. Austria (1),

4. Canada (214),

5. China, Hong Kong Special Administrative Region (1),

6. Colombia (1),

7. Costa Rica (1),

8. Denmark (1),

9. El Salvador (2),

10. France (5),

11. Germany (10),

12. Guatemala (1),

13. Ireland (1),

14. Israel (6),

15. Italy (5),

16. Netherlands (2),

17. New Zealand (5),

18. Poland (1),

19. Portugal (1),

20. Republic of Korea (3),

21. Spain (81),

22. Sweden (1),

23. Switzerland (1) and

24. the United Kingdom (32).

WHO is not recommending travel restrictions related to the outbreak of the influenza A(H1N1) virus.

Individuals who are ill should delay travel plans and returning travelers who fall ill should seek appropriate medical care. These recommendations are prudent measures which can limit the spread of many communicable diseases, including influenza.

Further information on the situation will be available on the WHO website on a regular basis.


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