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Preparing for the second wave: lessons from current outbreaks
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# G* D/ n9 ~8 f& K7 J0 H) a; M) iPandemic (H1N1) 2009 briefing note 9

, S- \  B. }( T) T+ y6 @28 AUGUST 2009 | GENEVA -- Monitoring of outbreaks from different parts of the world provides sufficient information to make some tentative conclusions about how the influenza pandemic might evolve in the coming months.

WHO is advising countries in the northern hemisphere to prepare for a second wave of pandemic spread. Countries with tropical climates, where the pandemic virus arrived later than elsewhere, also need to prepare for an increasing number of cases.

Countries in temperate parts of the southern hemisphere should remain vigilant. As experience has shown, localized “hot spots” of increasing transmission can continue to occur even when the pandemic has peaked at the national level.

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