CDC updates global dengue travel notice as cases climb

The US Centers for Disease Control and Prevention has updated its global dengue travel health notice after fresh surveillance data showed sustained transmission and above average case numbers in several popular tourism regions across the Americas, Africa and Asia.

Updated CDC travel notice highlights year round dengue risk

According to the latest update of the Global Dengue Travel Health Notice on November 10, 2026, the CDC continues to classify dengue as a Level 1 situation, advising travelers to practice usual precautions but underscoring that the virus now presents a year round risk in many tropical and subtropical destinations. Public information on the notice states that outbreaks commonly occur every two to five years and that multiple countries are currently experiencing higher than expected case numbers for the season.

The revised notice draws particular attention to destinations that are heavily visited by US travelers, including parts of Latin America, the Caribbean, South and Southeast Asia, and the Pacific. The country list attached to the notice includes Colombia, Bolivia, Costa Rica, Panama, Ecuador and its Galapagos Islands, as well as Vietnam, Cambodia, Malaysia, Sri Lanka, the Maldives, Kenya, Bangladesh, Cuba, Chad, Peru, the Marshall Islands and Vanuatu. The CDC indicates that these locations are reporting more dengue than anticipated or have generated an increased number of infections among returning US travelers.

While the overall alert level has not been raised to the more restrictive tiers that can trigger recommendations to postpone or avoid travel, the refresh signals that health agencies are watching the situation closely as the Southern Hemisphere heads into its peak dengue season. Public guidance accompanying the notice stresses that travelers should pay closer attention to mosquito bite prevention measures, particularly in low elevation urban and peri urban areas where the Aedes mosquitoes that transmit dengue thrive.

Global surveillance shows millions of cases but regional contrasts

Recent international surveillance summaries provide the broader context behind the CDC’s move. A global dengue update published by the World Health Organization in October 2026, synthesizing data to the end of August, reported around 2.2 million cases and more than 1,100 deaths in 97 countries, territories and areas so far this year. That figure is lower than the corresponding period in 2024 and 2025, but transmission remains intense in several regions where environmental conditions and urban growth favor mosquito breeding.

Regional monitoring by the European Centre for Disease Prevention and Control indicates that, by October 2026, publicly available reports pointed to more than 2.5 million infections and over 1,000 dengue related deaths worldwide. ECDC’s multi country brief notes that some countries are seeing less activity than in 2025, while others are substantially above historic averages. Countries in the Americas, parts of Asia and pockets of Africa stand out in recent updates, reflecting a complex and shifting mosaic of local epidemics.

In the Americas, a November 2026 situation report from the Pan American Health Organization documented more than 1.8 million suspected dengue cases for the year to epidemiological week 41, corresponding to a regional incidence of roughly 288 cases per 100,000 population. Central America, parts of the Andean region and the Caribbean have reported particularly high burdens, prompting PAHO to call for strengthened surveillance and vector control ahead of the Southern Hemisphere summer. Independent modeling from the Global Dengue Observatory similarly identifies above average activity in countries such as Cuba, Guyana and some African states, even as the global season to date is described as below average.

Key destinations facing heightened or above average dengue activity

For leisure and business travelers, the most immediate implications of the CDC notice relate to specific destinations now flagged for elevated dengue risk. The updated country list covers a large swath of Central and South America, where city breaks and nature focused trips are popular during the Northern Hemisphere winter. Ecuador, including the Galapagos Islands, and Peru have both appeared in recent surveillance summaries, with national health authorities reporting sustained dengue transmission alongside ongoing tourism operations.

Elsewhere in the Caribbean, Cuba and coastal parts of Central America, such as Panama and Costa Rica, have also recorded more cases than in typical years, according to regional reports. In some of these locations, tourism regions overlap with coastal urban areas where Aedes mosquitoes are well established, increasing the likelihood that visitors may encounter mosquitoes capable of transmitting dengue, especially during the rainy season or in the weeks after heavy rainfall.

Beyond the Americas, the notice highlights several Asian destinations that feature prominently on long haul itineraries from North America and Europe, including Vietnam, Cambodia, Malaysia, Sri Lanka, Bangladesh and the Maldives. Publicly available data compiled by national health agencies and summarized by international monitors indicate significant dengue activity in parts of South and Southeast Asia through mid 2026. In Africa, Kenya and Chad appear both in the CDC country list and in independent risk assessments, with modeling work suggesting case numbers multiple times higher than historical averages in some locations.

Travelers are also reminded that dengue risk is not uniform within countries. CDC guidance on dengue risk areas notes that Aedes mosquitoes generally live below about 2,000 meters, meaning that higher altitude destinations may have lower risk than coastal cities or lowland jungle areas within the same country. However, urbanization, climate variability and local mosquito control efforts can all influence conditions from one neighborhood to the next, and travelers are encouraged to check the most recent national and local advisories for their specific stops.

What the updated notice means for trip planning and on the ground behavior

The Level 1 designation attached to the Global Dengue notice indicates that the CDC is not advising against travel, but it does signal that visitors should adopt consistent protective behaviors. Publicly available travel health advice emphasizes using Environmental Protection Agency registered insect repellents containing active ingredients such as DEET or picaridin, wearing long sleeves and trousers where practical, choosing accommodations with air conditioning or well fitted screens, and using bed nets when sleeping in rooms that are open to the outdoors.

Because dengue is transmitted primarily by daytime biting mosquitoes, the notice underscores the importance of bite prevention during morning and late afternoon hours, not only at night. Travelers are encouraged to reduce standing water around lodging, such as in plant saucers or outdoor containers, which can serve as breeding sites for Aedes mosquitoes. Where available, hotels and guesthouses may advertise participation in local vector control programs, including regular inspections and insecticide treatments, as an additional reassurance.

Another message woven into the updated guidance is the importance of pre travel health consultations for people with underlying conditions or for those planning extended stays in high risk settings. Public material from the CDC on dengue and travel notes that severe dengue is more likely in people with previous infection and in certain clinical situations, and that rapid access to medical care can improve outcomes. Travelers are advised to learn the main symptoms, such as sudden high fever, severe headache, eye pain, muscle and joint aches and a rash, and to seek prompt medical evaluation if they become unwell during or after a trip to an affected area.

For travel industry professionals, the notice creates an opportunity to update customer facing information, including pre departure emails, in flight announcements on routes to affected destinations and briefing materials for tour leaders. Clear messaging that trips remain possible, but that mosquito bite prevention is essential, can help reassure travelers while reinforcing behaviors that reduce the risk of infection and limit onward transmission when visitors return home.

Monitoring the evolving dengue landscape through the peak travel season

The timing of the CDC’s dengue notice update comes just as international travel volumes are expected to remain high through the Northern Hemisphere holiday season and into early 2027. Climate forecasts pointing to ongoing El Niño conditions in parts of the Pacific and the Americas have raised additional concern among public health agencies, since warmer temperatures and altered rainfall patterns can extend mosquito breeding seasons and expand the geographic range of competent vectors.

Organizations such as WHO, PAHO, ECDC and national ministries of health continue to publish regular dengue situation reports that track case numbers, deaths and geographic spread. These summaries now feed into near real time surveillance tools, including dashboards that integrate case notifications, laboratory data and environmental indicators. Travelers planning trips to affected regions over the coming months can use these publicly available resources, alongside the CDC travel health pages, to gauge how dengue activity is evolving in the specific countries on their itineraries.

As airlines add capacity to popular winter sun destinations and cruise lines adjust routes through the Caribbean and Pacific, travel planners are watching for any further changes to health advisories that might affect demand or require additional on board messaging. For now, the updated CDC notice keeps dengue on travelers’ radar without imposing new restrictions, reinforcing a broader shift in global travel where awareness of vector borne diseases is becoming a standard part of trip preparation, alongside passports, visas and insurance.