Since the previous update on 14 November 2025 and as of 12 December 2025 (data collection period), 26 818 Chikungunya virus disease (CHIKVD) cases have been detected, including 83 associated deaths, from 12 countries (data available until 30 November). Cases reported in November have decreased by 39.4% compared to October, when 44 295 were reported. Deaths have increased in November when compared to the previous month, when one death was reported.
New countries reporting cases
Mexico has reported CHIKVD cases in November and for the first time in 2025. Ongoing CHIKVD outbreaks worldwide Currently, 14 countries have ongoing CHIKV outbreaks (time window of last 60 days). Of these, the majority are in the Americas and Asia.
The Americas
Argentina: CHIKVD cases are reported through the year in the country. Most of the cases located in the Central, North-Eastern and Nort-Western departments of the country, while nearly no cases are reported in the Southern departments. During epidemiological weeks 31 to 48, the departments reporting the highest number of cases are Cordoba (Central), Salta (North-East), and Chaco (North-West). CHIKVD cases in Argentina have increased during the period October-November when compared to August-September 2025.
Barbados: The country continues to report sporadic cases of CHIKVD in 2025. The first cases were reported between January and March (six), while cases were later reported in September (three) and November (two), bringing the total number of CHIKVD cases in 2025 to 11. Case numbers reported in 2025 are similar to 2024.
Bolivia: CHIKVD cases have been reported in six out of nine departments: Santa Cruz, Beni, Pando, Cochabamba, Chuquisaca, and Tarija. These departments are located in the eastern side of Bolivia, in the Andean region. Santa Cruz continues to be the most affected department, reporting most of CHIKVD cases in Bolivia, as well as all CHIKVD associated deaths. Guillain-Barre syndrome cases associated to CHIKVD have been reported in Bolivia.
Brazil: CHIKVD cases continue to be reported in all regions (Centro-Oeste, Nordeste, Norte, Sudeste and Sul) and in most federal units of the country. The Centro-Oeste, Nordeste, and Sudeste regions account for the highest number of cases in the last four reported epidemiological weeks (45-48), where Mato Grosso Do Sul, Minas Gerais, and Sao Paulo are the most affected federal units. During the last three months (July-November), CHIKVD cases have continuously declined. Even though previous years’ trends (2023 and 2024) suggested CHIKVD cases would start increasing by November, reported CHIKVD cases in November 2025 suggest the opposite, where CHIKVD cases continue to be at similar levels as in August-September 2025. This year, most of the cases have been reported among females (60%), being the 20 to 29 years age group the most affected one.
Colombia: CHIKVD cases are sporadically reported in Colombia. In 2025, 45 CHIKVD cases have been reported until 30 November, which is a decrease in the number of cases when compared with the same period from previous years (2022-2024). CHIKVD laboratory confirmed cases have been reported from Antioquia and Atlantico departments.
Cuba: The current CHIKVD outbreak in Cuba continues affecting all 14 provinces of the island. The most affected provinces are Matanzas, La Habana, Camaguey, Cienfuegos, Artemia, and Villa Clara. These provinces have accounted for most of the reported cases in Cuba in previous months. During November, the first CHIKVD associated deaths have been reported this year in the country.
El Salvador: CHIKVD cases have been sporadically reported in the country during 2025. In November 2025, seven new CHIKVD cases have been reported, bringing the total to 23. So far, no CHIKVD associated deaths have been reported in 2025. This is the lowest number of CHIKVD cases reported for the same period since 2021.
Guatemala: CHIKVD cases have been sporadically reported in the country during 2025, reaching a total of 24 cases reported by November. This is a decrease of CHIKVD cases reported in the country when compared to the same period since 2021.
Honduras: CHIKVD cases have been sporadically reported in the country during 2025, reaching a total of 12 cases reported by November. This is an increase of CHIKVD cases reported in the country when compared to to the same period since 2023.
Mexico: Locally acquired CHIKVD cases have been sporadically reported in the country in 2025, reaching a total of six cases. Of these, two were reported in November from Chiapas and Quintana Roo States. In 2025, CHIKVD cases have been reported from Chiapas (1), Quintana Roo (4), and Yucatan (1). No deaths have been reported in 2025. In 2024, no CHIKVD cases were reported, while in 2023 two cases were reported from Bahia California Sur and Chiapas.
Uruguay: CHIKVD cases have been sporadically reported in the country during 2025, reaching a total of eight cases reported by November. This is an increase of CHIKVD cases reported in the country when compared with 2024. CHIKVD cases notifications have decreased in the country since the national scale outbreak of 2023, which is considered the largest outbreak ever documented in the country mainly affecting Central, Asuncion, and Alto Parana departments.
In 2025, there have been 291 066 CHIKVD disease cases and 201 associated deaths reported in the region. This is a decrease of 29.4% compared to the same period of the previous year. The most affected subcontinental region is South America, with Brazil reporting the highest number of cases in 2025.
Asia
China: CHIKVD cases continue to be reported in Guangdong province, following the first notified case in July 2025. Most of the cases are now reported from Shenzhen, Jiangmen, and Shantou cities. Weekly number of cases reported in Guangdong province show a decreasing trend (epidemiological weeks 45-48), reaching the lowest number of cases reported since the start of the outbreak. Outside of Guangdong province, CHIKVD cases have been also reported from the Special Administrative Region of Hong Kong and Guangxi province. Initial cases have been associated with imported cases from Guangdong province.
Pakistan: CHIKVD cases are reported throughout the year in Pakistan, concentrated in Baluchistan, Khyber Pakhtunkhwa, and Sindh provinces. These provinces are located in the Southwest of the country. Of these provinces, the highest number of CHIKVD cases is reported from Sindh, a province bordering with India. In November 2025, CHIKVD cases continued to be reported from Khyber Pakhtunkhwa, and Sindh provinces at lower levels when compared to previous four months (JulyOctober).
Singapore: CHIKVD cases have been reported in the country since early August. Cases continued to be reported in September and October. No new CHIKVD cases were reported in November. The initial outbreak reported in August has been associated with travellers returning from Guangdong province, China.
In 2025, there have been 136 747 CHIKVD cases and no associated deaths in the region. This is a decrease of 31.8% compared to the same period of the previous year. The most affected subcontinental region is Southeast Asia, with India reporting the highest number of cases in 2025.
Africa
In 2025, there have been 2 197 CHIKVD cases and no associated deaths in the region. This is an increase compared to the same period of the previous year. The most affected subcontinental region is East Africa, with Mauritius reporting the highest number of cases in 2025.
Europe
For CHIKVD cases reported in mainland EU/EEA, please refer to the dedicated ECDC webpage. CHIKVD cases have been reported from the French outermost regions of Réunion and Mayotte
Other countries reporting CHIKV disease cases in 2025
Other countries have also reported CHIKVD cases in 2025; however no new cases have been notified in the last two months, these countries are: Comoros, Costa Rica, India, Kenya, Mauritius, Paraguay, Peru, Senegal, and Sri Lanka.
Global overview
In 2025, there have been 485 908 CHIKVD cases and 229 associated deaths reported worldwide, including cases reported in the EU/EEA and outermost regions. Cases have increased when compared to the same period in 2024.
