Chikungunya virus disease worldwide overview

New countries reporting cases 

Colombia, Cuba, Guatemala, Guyana, Mauritius, Peru, and Saint Lucia have reported CHIKVD cases for the first time in 2026.

Detailed Overview

In 2026, 18 countries have ongoing CHIKVD outbreaks. Of these, the majority are in the Americas. Below is a description of ongoing outbreaks: 

Americas

In 2026, there have been 32 529 CHIKVD cases and nine associated deaths reported in the region. The most affected subcontinental region is South America, with Brazil reporting the highest number of cases in 2026.

• Argentina: CHIKVD cases are reported through the year in the country. Since the start of the year and as of epidemiological week 8 (22–28 February), two local outbreaks have been confirmed in the country, from the Salta and Tucuman provinces. The current outbreak in Salta has registered 36 cases, with 29 being confirmed. The highest number of cases are from the General Jose de San Martin department. 
• Bolivia: CHIKVD cases have been extensively reported in the country since the start of 2026, being the most affected departments Santa Cruz, Cochabamba, Tarija and La Paz. Santa Cruz continues to be the most affected department, reporting most of CHIKVD cases in Bolivia. According to Bolivian health authorities, cases have been decreasing at national level in the last weeks. 
• 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, Sudeste, and Nordeste regions account for the highest number of cases in the last four epidemiological weeks (5-8), where Goias, Mato Grosso Do Sul, Minas Gerais, and Sao Paulo are the most affected federal units. Since the start of 2026, CHIKVD cases have continuously increased in Brazil until epidemiological week 08. This year, most of the cases have been reported among females (58%), being the 20 to 29 years age group the most affected one. 
• Colombia: CHIKVD cases have been sporadically reported during the year. Confirmed CHIKVD cases have been reported from Antioquia, Huila, and Santander departments. According to Colombian health authorities, in 2026 frequency of reported cases has increased when compared to the same period of 2025. 
• Costa Rica: In 2026, two CHIKVD cases have been reported from Puntarenas city, Esparza region. Epidemiological investigations suggest that both cases might be epidemiologically linked, and infected in the same time period. No further CHIKVD cases have been reported in other regions of Costa Rica in 2026.
• Cuba: CHIKV continues to circulate in the country, and has affected all 14 provinces of the island. Known provinces reporting high number of cases 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 2025, the first CHIKVD associated deaths have been reported this year in the country. 
• El Salvador: In 2026, one suspected CHIKVD case has been reported in the country. No further cases have been reported in the country. 
• Guatemala: In 2026, one confirmed CHIKVD case has been reported in the country. The case was reported from San Marcos department, bordering with the Mexican Chiapas State, where CHIKVD cases have also been reported in 2026. In 2025, no confirmed CHIKVD cases were reported in Guatemala. 
• Guyana: In 2026, two CHIKVD have been reported in the country. Cases of CHIKVD are sporadically reported in Guyana, reaching a total of six cases in 2025. 
• Honduras: In 2026, one CHIKVD case has been reported in the country. Cases are sporadically reported in the country, and in 2025 there were a total of 12 cases reported in the country. 
• Mexico: In 2026 and as of epidemiological week 7, locally acquired CHIKVD cases have been reported in the country from Chiapas and Quintana Roo. No new affected areas have been reported since the previous update. In 2025, CHIKVD cases were reported from Chiapas, Quintana Roo, and Yucatan. 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. 
• Paraguay: In 2026, there have been two confirmed cases and one probable case reported in the country. In the same time period in 2024, two probable cases were reported. 
• Peru: In 2026, until epidemiological week 6, one confirmed CHIKVD case has been reported in the country. The case has been reported from Cusco department, in a male under 18 years old. 
• Saint Lucia: In 2026, Saint Lucia reported a locally acquired CHIKVD case. This is the first autochthonous case since 2021. The person was hospitalized and later discharged. 
• Suriname: CHIKVD cases continue to be reported in the country. Currently, cases have been reported in seven out of ten districts of the country (Paramaribo, Wanica, Nickerie, Coronie, Commewijne, Marowijne, and Para). No cases have been reported in Brokopondo, Sipaliwini, and Saramacca.

Asia 

In 2026, 16 CHIKVD cases and no associated deaths have been reported in the region. The most affected subcontinental region is Southeast Asia, with Pakistan being the only country reporting cases in 2026. 

• Pakistan: A total of 16 CHIKVD case has been reported in the country in 2026. All cases have been reported from Sindh region. 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. 

Africa 

In 2026, approximately 213 CHIKVD cases and no associated deaths have been reported in the region. The most affected subcontinental region is East Africa. 

• Madagascar: In 2026, until epidemiological week 6, 29 confirmed CHIKVD cases have been reported in the country. Cases have been reported from Mahajanga, Toamasina, and Antsirabe. Of there, Mahajanga accounts for the highest number of reported cases. 
• Mauritius: CHIKVD cases has been reported in the country since January 2026. The current outbreak seems to have an increasing trend, with more cases reported in February when compared to January.
• Seychelles: In 2026, CHIKVD cases have been reported in the archipelago. According to local health authorities, CHIKV has become more prevalent in the country, when compared to other arboviruses.

Europe 

This week, no new cases of chikungunya virus disease have been reported to ECDC. All clusters reported in France and Italy are now closed. For CHIKVD cases reported in mainland EU/EEA, please refer to the dedicated page: Seasonal surveillance of chikungunya virus disease in the EU/EEA, weekly report. CHIKVD cases have been reported from the French outermost regions of French Guiana, Mayotte and Réunion. In French Guiana, these are the first autochthonous cases reported since 2015. In Mayotte, a recent increase in case numbers has been reported since week 3 of 2026. 

Global overview 

In 2026, there have been 32 729 CHIKVD cases and nine associated deaths reported worldwide. Cases have decreased when compared to the same period in 2025.