Sri Lanka is facing the heaviest burden, with more than 42,000 cases and 24 deaths reported by mid-June, alongside roughly 600 new cases a day. Vietnam, the Philippines, Malaysia, Indonesia, and India are also reporting significant case numbers, indicating that dengue activity is widespread rather than confined to a single country or outbreak cluster.
The report also notes that other mosquito-borne viruses are circulating in parts of the region. Chikungunya has been detected in areas including Kerala in India and localized parts of Indonesia, while Zika activity appears limited but continues to be monitored. This reinforces the broader public-health challenge of tracking multiple vector-borne diseases at the same time.
Seasonal conditions are adding to the risk. As monsoon weather and peak transmission periods continue in many countries, public-health agencies are relying on surveillance, mosquito control, and prevention campaigns to slow further spread. Some areas are also experimenting with newer interventions, including Wolbachia-based mosquito releases.
Overall, the 2026 regional picture suggests dengue is not easing across Asia-Pacific. Instead, the region is dealing with a high-burden season marked by large outbreaks, continued cross-border risk, and pressure on health systems to stay ahead of mosquito population growth.
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