Dengue worldwide overview

In Martinique, transmission of dengue continues at high and stable levels the past four weeks, with 36 cases reported the week of 19–25 January 2026, according to the Dengue Surveillance Report published on 29 January 2026. 

In the other French outermost regions, dengue cases have been reported but at expected levels. 

In Guadeloupe, according to the same report, dengue is circulating at expected levels for the season, with 12 confirmed cases reported in the two-week period from 12–25 January 2026. 

In Saint Martin, no cases were reported the week of 19–25 January 2026 (Dengue aux Antilles. Bulletin du 29 janvier 2026). 

In Reunion, 10 cases of dengue have been reported since the beginning of 2026 and as of 1 February, with six of them reported between 19 January and 1 February 2026 (Surveillance sanitaire à La Réunion. Bulletin du 6 février 2026). 

In French Guiana, dengue activity remains low, with one case reported between 19 January and 1 February 2026 (Surveillance sanitaire en Guyane. Bulletin du 5 février 2026). 

A summary of recent epidemiological trends of dengue outside the EU/EEA for January 2026 is presented below. The summary is based on available information from official sources and reports from different countries/territories. 

The Americas

In the Americas, according to PAHO, as of week 2 2026 (ending 11 January 2026), 69 772 cases have been reported, of which 18% were laboratory confirmed. The currently reported number of cases is 60% less than the number of cases reported in the same period in 2025 and 44% less than the average for the last five years, according to the WHO PAHO report published on 8 February 2026. While all serotypes have been reported so far in 2026, their distribution differs in the different PAHO countries (Report on the epidemiological situation of dengue in the Americas). 

Asia

According to the WHO SEARO epidemiological bulletin published on 11 February, dengue cases have been reported in January 2026 in the region by Bangladesh, India, Nepal, Sri Lanka, Thailand and Timor-Leste. 

• Thailand and India reported 1 903 and 3 544 cases, respectively, in January 2026. In both countries, the total number of cases reported in January 2026 was less than the total number of cases reported for the same period in 2025. 

Bangladesh, Nepal and Sri Lanka have also reported cases in comparable levels to previous years and in all countries the case numbers reported for the most recent weeks showed a decreasing trend. 

• Bangladesh reported 1 502 cases as of 8 February 2026 (108 cases the week 2–8 February vs 136 cases the week 26 January to 1 February 2026).
• Nepal reported 178 cases in January 2026 and 317 cases in December 2025.
• Sri Lanka reported 8 014 cases as of 1 February 2026 (1 511 cases the week 26 January to 1 February vs 1 785 cases the week 19–25 January 2026). 

An increasing trend in the case numbers has been reported in Timor Leste in January, which is over four times the number of cases reported in December (1 281 cases reported in January 2026 vs 279 cases reported in December 2025).

Meanwhile, Maldives continued reporting increases of cases until end of 2025 (411 cases reported in December vs 382 cases reported in November 2025); however, for January 2026, no data have been made available publicly (according to the SEARO report). 

In the Western Pacific WHO Region, cases of dengue have been reported by Cambodia, Indonesia, Laos, Singapore and Vietnam, in the report of 5 February 2026 (WHO WPRO Dengue Situation Update #739: 5 February 2026). The following trends were highlighted by country: 

• Cambodia: there is a decreasing weekly trend since the beginning of 2026 and a total of 2 345 cases for the period 1–25 January 2026.
• Indonesia: a decreasing trend has been noted compared with the previous few months (403 cases reported in January, as of 21 January 2026).
• Laos: a decreasing weekly trend has been observed, with 80 cases reported the week 19–25 January vs 88 cases reported the week before.
• Singapore: 99 cases were reported as of 24 January 2026; this is 64.6% less than the number of cases reported for the same period in 2025.
• Vietnam: over 20 000 cases have been reported since 18 December 2025 and up to 17 January 2026, showing an increasing trend.

Africa

Lastly, in Africa and as of 4 February 2026, 209 cases have been reported by Mali (193), Mauritania (13) and Senegal (3) (Africa CDC Epidemic Intelligence Weekly Report, February 2026 – Africa CDC)