Vietnam reports over 170,000 dengue cases as outbreaks defy seasonal patterns
Vietnam is facing an unpredictable surge in dengue fever cases that no longer follow traditional seasonal patterns. Health officials attribute this shift to climate change and increased rainfall, complicating prevention efforts.
Why it matters
The changing patterns of infectious diseases due to climate change pose a significant threat to public health infrastructure and global health security.
Dengue outbreaks becoming increasingly unpredictable
Vietnam's dengue situation is growing more complicated, with infections spreading widely and no longer following their usual seasonal cycles. In 2025, the country recorded the highest number of dengue cases in the Asia-Pacific region.
On November 6, the Ministry of Health's Department of Disease Prevention, in coordination with relevant organizations, held the Dengue Summit 2026 to assess the disease burden and discuss prevention strategies.
According to reports presented at the event, dengue is among the world's fastest-growing mosquito-borne infectious diseases, with an estimated 100 million to 400 million infections annually.
In Vietnam, dengue has remained a persistent public health challenge for more than four decades.
Since 1980, the country has recorded hundreds of thousands of cases, with deaths reported every year.
Also covering this story
One other newsroom covered this event. We read that version too.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in