Across the Asia Pacific region, 2013 was one of the worst years for dengue, with a number of countries seeing a more than two-fold increase in reported cases and deaths compared to 2012 in some nations. All four serotypes are now circulating in many countries – including Malaysia, Singapore, Thailand and Vietnam.

Trends vary across the region but, most notably, some nations have reported an increase in adolescent and adult cases, and a spread to rural and other low dengue transmission areas.

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