Chikungunya virus disease worldwide overview

New countries reporting cases 

Seychelles and Suriname have reported CHIKVD cases for the first time in January 2026.

Detailed Overview

The Americas

In 2026, there have been 2 879 CHIKVD cases and one associated death 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 throughout the year in the country. Since the start of the year and as of epidemiological week 4 (25–31 January), there are no confirmed autochthonous cases reported in the country, with all confirmed cases related to travel outside of Argentina. Most of these cases have been reported from Buenos Aires and Cordoba jurisdictions. 

Bolivia: CHIKVD cases have been increasing since the start of 2026 and have been reported in seven of nine departments: Santa Cruz, Beni, Pando, Chuquisaca, Cochabamba, Chuquisaca, and Tarija. These departments are located in eastern Bolivia, in the Andean region. Santa Cruz continues to be the most affected department, reporting most of the CHIKVD cases in Bolivia, as well as all CHIKVD associated deaths. Guillain-Barre syndrome cases associated to CHIKVD were reported in Bolivia in 2025. 

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 epidemiological weeks (weeks 1–4), where 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 until epidemiological week 3, showing a decline in epidemiological week 4 when compared with the previous week. This year, most of the cases have been reported among women (57%), and the 20–29 years old age group is most affected. 

Costa Rica: In 2026, two CHIKVD cases have been reported from Puntarenas city, Esparza region. Early epidemiological investigations suggest that these two cases might be epidemiologically linked, and could have been infected during the same time period. No further CHIKVD cases have been reported in other regions of Costa Rica in 2026. 

El Salvador: In 2026, one suspected CHIKVD case has been reported in the country. Currently, the case is awaiting laboratory confirmation. This suspected case was detected in a context where other suspected cases of arboviruses, such as dengue, are showing a declining trend since the start of the year. 

Honduras: In 2026, one CHIKVD case has been reported in the country. Chikungunya cases are sporadically reported in the country, and in 2025 there were a total of 12 cases reported. SURVEILLANCE REPORT Weekly Communicable Disease Threats Report, Week 7, 7–13 February 2026 16 

Mexico: In 2026 and as of epidemiological week 4, locally acquired CHIKVD cases have been reported in the country from Chiapas and Quintana Roo. 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 Baja California Sur and Chiapas. 

Suriname: In 2026, CHIKVD cases have been reported in the country. The cases occurred in the regions of Paramaribo, Nickerie, Wanica and Commewijne. In Suriname, in week 51 of 2025, the first autochthonous case of CHIKVD was reported since 2016. Between week 51 2025 and week 4 2026, a total of 712 suspected cases were reported, of which 327 were laboratory confirmed, including one death. The rainy season is still ongoing, and it is expected that cases will continue to be reported in the coming weeks. 

United States (US): In December 2025, one CHIKVD case has been reported in the Miami-Dade County, Florida. Most CHIKVD cases reported in the US are travel associated, with very few locally acquired cases reported.

Asia

In 2026, one CHIKVD case 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: One CHIKVD case has been reported in the country in 2026. The case was reported in the Sindh region. CHIKVD cases are reported throughout the year in Pakistan, concentrated in the Baluchistan, Khyber Pakhtunkhwa and Sindh provinces. These provinces are located in the southwest of the country. In 2025, the highest number of CHIKVD cases were reported from Sindh, a province bordering with India.

Africa

In 2026, an unconfirmed number of CHIKVD cases and no associated deaths have been reported in the region. The most affected subcontinental region is East Africa, with Seychelles being the only country reporting cases in 2026. 

Seychelles: In 2026, an unconfirmed number of CHIKVD cases have been reported in the archipelago. According to local health authorities, CHIKV has become more prevalent in the country when compared with other arboviruses. It is expected that CHIKVD cases will continue to be reported in the country. ECDC is aware of a number of reports in EU/EEA countries of imported cases linked to travel to the Seychelles since December 2025.

Europe

For CHIKVD cases reported in mainland EU/EEA, please refer to the dedicated ECDC website. 

CHIKVD cases have been reported from the French outermost regions of French Guiana (4), Mayotte (44) and Réunion (8). 

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 2 882 CHIKVD cases and one associated death reported worldwide. Cases have decreased when compared with the same period in 2025.