OUTBREAK SURVEILLANCE

Between 15 March and 14 April 2026, a total of 19,161 suspected and 2,973 confirmed measles cases with 30 (166 suspected) confirmed measles-related deaths have been reported from Bangladesh. The highest number of suspected cases have been reported from Dhaka, Rajshahi, Chattogram and Khulna. Children under five years account for the majority of reported cases. Please see our Topics in Brief article for further details on measles.

Between 15 March and 7 April 2026, a total of 1,398 confirmed measles cases with 21 (128 suspected) deaths have been reported in Bangladesh. The highest number of suspected cases have been reported from the Dhaka, Rajshahi and Chattogram Divisions. Please see our Topics in Brief article for further details on measles.

As of 7 April 2026, a total of 676 confirmed measles cases, with over 38 deaths, have been reported in Bangladesh for 2026. An emergency vaccination campaign, initially prioritising children in densely populated and high-risk areas, started on 5 April 2026 and UNICEF is supporting health facilities in high-burden areas. Please see our Topics in Brief article for further details on measles.

As of 13 August 2026, 42 cases of locally acquired West Nile virus have been reported in Spain, in two areas. Please see our Topics in Brief article for further details on West Nile virus.

As of 29 July 2026, seven locally acquired cases of West Nile virus have been reported in two areas in Spain. Please see our Topics in Brief article for further details on West Nile virus.

As of 6 August 2026, a total of 17,880 dengue cases (59 deaths) have been reported in Bangladesh during 2026. Dhaka division has reported the highest number of cases, followed by Barishal, Chattogram and Khulna divisions. Please see our Topics in Brief article for further details on dengue.

As of 30 November 2025, a total of 95,081 dengue cases and 380 deaths have been reported in Bangladesh during 2025. Please see our Topics in Brief article for further details on dengue.

As of 10 November 2025, a total of 79,722 dengue cases and 315 deaths have been reported in Bangladesh in 2025. Most cases have been reported in Barishal (18,627 cases) followed by Dhaka (13,455 cases). Please see our Topics in Brief article for further details on dengue.

As of 2 November 2025, a total of 71,675 dengue cases and 283 deaths, have been reported in Bangladesh for 2025. Currently, the highest number of cases and deaths were reported in October 2025, with 22,520 cases and 80 deaths. Please see our Topics in Brief article for further details on dengue.

As of 26 October 2025, a total of 66,423 cases (including 269 deaths) of dengue have been reported in Bangladesh during 2025. Please see our Topics in Brief article for further details on dengue.

As of 19 October 2025, a total of 59,849 cases (including 245 deaths) of dengue have been reported in Bangladesh during 2025. Please see our Topics in Brief article for further details on dengue.

As of 22 September 2025, a total of 42,509 cases of dengue have been reported in Bangladesh. Please see our Topics in Brief article for further details on dengue.

As of 2 September 2025, a total of 32,501 dengue cases, and 125 deaths have been reported in Bangladesh since 1 January 2025. Please see our Topics in Brief article for further details on dengue.

As of 3 August 2025, a total of 21,670 dengue cases and 84 deaths have been reported in Bangladesh since 1 January 2025. Please see our Topics in Brief article for further details on dengue.

As of 13 July 2025, a total of 15,569 dengue cases with 59 dengue-related deaths have been reported during 2025. This represents a large increase compared to the corresponding period in 2024. Please see our Topics in Brief article for further details on dengue.

On 11 June 2025, 5,303 dengue cases and 23 deaths have been reported from 1 January to 11 June 2025. Please see our Topics in Brief article for further details on dengue.

As of 26 September 2026, 252 cases of locally acquired dengue were reported in Florida, USA. The outbreak has surpassed Florida's previous annual high of 200 cases, reported in 2023. Dengue serotypes 2 and 3 have been identified amongst cases in 2026. Please see our Topics in Brief article for further details on dengue.

Between 6 and 12 September 2026, 41 new cases of locally acquired dengue were reported in Florida, bringing the total for 2026 to 152. Please see our Topics in Brief article for further details on dengue.

As of 29 August 2026, 73 cases of locally acquired dengue have been confirmed in Florida, USA. Please see our Topics in Brief article for more details on dengue.

As of 22 August 2026, a total of 41 locally acquired dengue cases have been reported in Florida in 2026. Serotypes DENV-2 and DENV-3 have been confirmed. Please see our Topics in Brief article for further details on dengue.

As of 15 August 2026, a total of 23 locally acquired cases of dengue have been confirmed in Florida during 2026. Serotypes DENV-2 (20) and DENV-3 (2) have been confirmed. Please see our Topics in Brief article for further details on dengue.

As of 3 August 2026, a locally acquired case of dengue has been confirmed in Florida, Miami-Dade County. Please see our Topics in Brief article for further details on dengue.

As of 28 July 2026, a locally acquired case of dengue has been confirmed in Hillsborough County, Florida. Please see our Topics in Brief article for further details on dengue.

Between 1 January and 28 March 2026, 32 confirmed cases of hantavirus infection and eight deaths have been reported. Cases have been reported in the following provinces: Buenos Aires, Salta, Chubut, Río Negro, Entre Ríos and Jujuy. Please see UKHSA guidance for more details on hantavirus.

As of 8 February 2026, 19 cases of hantavirus have been reported in Argentina since the start of the year. This brings the total number of cases reported since July 2025 to 79. The Centro and South regions have been most severely affected. Please see UKHSA guidance for more details on hantavirus.

As of 20 November 2025, 66 cases of hantavirus pulmonary syndrome (including 21 deaths) have been reported in Argentina during 2025. The Central Region has reported 64% of cases. Please see UKHSA guidance for more details on hantavirus.

As of 12 August 2026, a total of 224 locally acquired cases of West Nile virus, with seven deaths (one in an imported case), have now been reported from 55 provinces in 16 regions of Italy during 2026. Please see our Topics in Brief article for further details on West Nile virus.

As of 5 August 2026, 139 locally acquired cases of West Nile virus have been reported in 50 provinces in Italy. Please see our Topics in Brief article for further details on West Nile virus.

As of 29 July 2026, 94 locally acquired cases of West Nile virus have been reported in 30 areas in Italy. Please see our Topics in Brief article for further details on West Nile virus.

As of 17 July 2026, a total of 21 cases of West Nile Virus have been reported in Italy. Please see our Topics in Brief article on West Nile virus.

As of 13 August 2026, 105 cases of locally acquired West Nile virus have been reported in Greece, in 13 areas. Please see our Topics in Brief article for further details on West Nile virus.

As of 29 July 2026, 42 locally acquired cases of West Nile virus have been reported in eight areas in Greece. Please see our Topics in Brief article for further details on West Nile virus.

As of 16 September 2026, a total of 92 locally acquired West Nile virus cases have been reported during 2026. For the first time human West Nile virus cases have been detected in the departments of Aude (Occitanie), Seine-et-Marne (Île-de-France), Drôme (Auvergne-Rhône-Alpes), Loire-Atlantique, Maine-et-Loire (Pays de la Loire), and Loiret (Centre-Val de Loire). Please see our Topics in Brief article for further details on West Nile virus.

As of 6 September 2026, a total of 56 locally acquired West Nile virus cases have now been reported during 2026 in the regions of Auvergne-Rhône-Alpes, Île-de-France, Nouvelle-Aquitaine, Occitanie and Provence-Alpes-Côte d'Azur of mainland France. This is the first time human West Nile virus cases have been detected in the departments of Aude (Occitanie), Seine-et-Marne (Île-de-France) and Drôme (Auvergne-Rhône-Alpes). For six cases, no specific place of infection could be identified. Please see our Topics in Brief article for further details on West Nile virus.

As of 17 August 2026, 18 autochthonous cases of West Nile virus have been recorded across France in the Provence-Alpes-Côte d'Azur region (Bouches-du-Rhône and Vaucluse departments), Occitanie (the departments of Pyrénées-Orientales, Aude, Haute-Garonne, and Gard), and Île-de-France (the departments of Essonne and Seine-St-Denis).

As of 10 August 2026, a total of six locally acquired West Nile virus cases have now been reported during 2026 in the Occitanie (Aude and Pyrénées-Orientales) and Provence-Alpes-Côte d'Azur (Bouches-du-Rhône and Vaucluse) regions of France. Please see our Topics in Brief article for further details on West Nile virus.

As of 27 July 2026, two locally acquired cases of West Nile virus were recorded in Pyrénées-Orientales (Occitanie) and Bouches-du-Rhône (Provence-Alpes-Côte d'Azur). Please see our Topics in Brief article for further details on West Nile virus.

As of October 20 2025, 57 human cases of vector-acquired West Nile virus infection have been identified in 17 departments of mainland France. Cases have been recorded in the Provence-Alpes-Côte d'Azur, Nouvelle-Aquitaine and Occitanie regions, historically affected by the West Nile virus, and in Île-de-France, Auvergne-Rhône-Alpes and Normandy, affected for the first time in 2025. Please see our Topics in Brief article for further details on West Nile virus.

As of 13 October 2025, 48 locally acquired cases of West Nile virus were reported in France during 2025. Cases have been identified from 15 departments in the following regions: Provence Alpes-Côte d'Azur, Occitanie, Nouvelle-Aquitane and for the first time Île-de-France and Auvergne-Rhône-Alpes. Please see our Topics in Brief article for further details on West Nile virus.

As of 15 September 2025, 32 locally acquired cases of West Nile virus were reported in France. Cases have been identified from 10 departments in the following regions: Provence Alpes-Côte d'Azur, Occitanie, and for the first time Île-de-France and Auvergne-Rhône-Alpes. Please see our Topics in Brief article for further details on West Nile virus.

As of 3 September 2025, 20 locally acquired cases of West Nile virus were reported from France. Cases have been reported from Provence Alpes-Côte d'Azur, Occitanie, and for the first time Île-de-France and Auvergne-Rhône-Alpes. Please see our Topics in Brief article for further details on West Nile virus.

As of 19 August 2025, 13 locally acquired cases of West Nile virus were reported from France. Cases have been reported from Provence Alpes-Côte d'Azur, Occitanie, Corsica and for the first time Île-de-France. Please see our Topics in Brief article for further details on West Nile virus.