Since July 2006, chikungunya infection has been a notifiable disease in mainland France and the French departments in the Americas, and since 2008 in Réunion.

The criteria for reporting chikungunya are the presence of a sudden-onset fever >38.5°C, debilitating joint pain, and laboratory confirmation (positive IgM or positive PCR).

For dengue, the reporting criteria are a sudden onset of fever exceeding 38.5°C with at least one pain-related symptom (headache, arthralgia, myalgia, low back pain, retro-orbital pain) and biological confirmation (RT-PCR, NS1 test, or positive IgM)

• 2021

• 2020

• 2019

• 2018

• 2017

• 2016

• 2015

• 2014

• 2013

• 2012

• 2011

• 2008–2009

• 2006–2007

• Summary 2006–2013

Epidemiological surveillance of arboviral diseases has enabled the regular identification of outbreaks of local transmission of dengue, chikungunya, and Zika. This report provides a summary of these findings since the first identification in 2010.

• Read the report

Learn more:

• Outbreaks of dengue and chikungunya in mainland France, 2010–2018

• Surveillance of arboviral diseases in mainland France: sharp increase in cases of locally transmitted dengue in 2022

• Access the monitoring data for 2024

• Access the monitoring data for 2023

• Access the 2022 monitoring data

• Access the 2021 monitoring data

From May 1 to November 30 each year, Santé publique France coordinates enhanced seasonal surveillance for chikungunya, dengue, and Zika in the metropolitan departments where the vector mosquito, Aedes albopictus, is present, in collaboration with the relevant Regional Health Agencies (ARS) (see surveillance system and partners).

From May 1 to November 27, 2020, the following cases were confirmed:

• 834 imported cases of dengue (of which 64% had visited Martinique and 23% Guadeloupe);

• 6 imported cases of chikungunya;

• 1 imported case of Zika.

Since the start of this period of enhanced surveillance, 6 indigenous dengue outbreaks have been identified, for which epidemiological investigations and field actions were immediately implemented (notably vector control):

• In Provence-Alpes-Côte d'Azur, 3 outbreaks were identified:

  • An outbreak of 3 locally transmitted dengue cases with onset dates (OD) between August 1, 2020, and August 11, 2020, in La Croix-Valmer (Var).

  • Another outbreak of 5 cases in Nice with onset dates (OD) between August 11, 2020, and September 4, 2020.

  • A cluster of 2 cases with OODs ranging from September 19, 2020, to October 4, 2020, in Saint Laurent du Var.

• In Occitanie, three isolated autochthonous cases were also reported:

  • One locally acquired case of dengue fever in the Hérault department with a DDS on 07/17/2020.

  • One locally acquired case of dengue contracted in Hérault or Gard, with a date of onset on August 31, 2020.

  • One locally acquired case of dengue in the Gard department with a date of onset (DDS) on September 3, 2020.

See also the dengue situation in Martinique and Guadeloupe: view data for overseas territories.

List of departments where Aedes albopictus is present as of May 1, 2020:

Ain, Aisne, Alpes de Haute-Provence, Alpes-Maritimes, Ardèche, Ariège, Aude, Aveyron, Bas-Rhin, Bouches-du-Rhône, Charente, Charente-Maritime, Cher, Corrèze, Corse-du-Sud, Côte-d'Or, Deux-Sèvres, Dordogne, Drôme, Essonne, Gard, Gers, Gironde, Haute-Corse, Haute-Garonne, Hautes-Alpes, Hautes-Pyrénées, Haute-Savoie, Haut-Rhin, Hauts-de-Seine, Hérault, Indre, Isère, Landes, Loire, Loire-Atlantique, Lot, Lot-et-Garonne, Lozère, Maine-et-Loire, Nièvre, Paris, Puy-de-Dôme, Pyrénées-Atlantiques, Pyrénées-Orientales, Rhône, Saône-et-Loire, Savoie, Seine-et-Marne, Seine-St-Denis, Tarn, Tarn-et-Garonne, Val-de-Marne, Var, Vaucluse, Vendée, Vienne, Yvelines.

Maps showing the presence of the tiger mosquito (Aedes albopictus) in mainland France: click here

From May 1 to November 30 each year, Santé publique France coordinates enhanced seasonal surveillance for chikungunya, dengue, and Zika in the metropolitan departments where the vector mosquito, Aedes albopictus, is present, in collaboration with the relevant Regional Health Agencies (ARS) (see surveillance system and partners).

From May 1 to November 29, 2019:

• 657 imported cases of dengue, 14% of which had visited Réunion Island;

• 56 imported cases of chikungunya;

• 6 imported cases of Zika;

• 9 locally acquired cases of dengue;

• 3 locally acquired cases of Zika.

An outbreak of 2 locally acquired dengue cases was reported in the Rhône department.

An outbreak of 7 locally acquired dengue cases was identified in the Alpes-Maritimes.

An outbreak of 3 locally acquired cases of Zika virus infection was identified in the Var department.

For these two dengue outbreaks in the Rhône and Alpes-Maritimes departments and the two Zika virus cases in the Var department, epidemiological investigations have been launched to identify any other potential cases and to strengthen prevention and surveillance measures.
Healthcare professionals in the affected areas have also been trained to identify and report any other potential cases. Mosquito
control operators immediately launched entomological investigations and undertook targeted mosquito control actions. These actions are systematically accompanied by a prior information campaign for local residents.

They are distributed as follows:

List of departments with Aedes albopictus populations as of May 1, 2019 (the 9 new departments classified as Level 1 in 2018 are in bold): Ain, Aisne, Alpes de Haute-Provence, Alpes-Maritimes, Ardèche, Ariège, Aude, Aveyron, Bas-Rhin, Bouches-du-Rhône, Charente-Maritime, Corrèze, Corse-du-Sud, Côte d'Or, Dordogne, Drôme, Essonne, Gard, Gers, Gironde, Haute-Corse, Haute-Garonne, Hautes-Alpes, Hautes-Pyrénées, Haut-Rhin, Hauts-de-Seine, Hérault, Indre, Isère, Landes, Loire, Lot, Lot-et-Garonne, Lozère, Maine-et-Loire, Nièvre, Paris, Puy-de-Dôme, Pyrénées-Atlantiques, Pyrénées-Orientales, Rhône, Saône-et-Loire, Savoie, Seine-et-Marne, Seine-Saint-Denis, Tarn, Tarn-et-Garonne, Val-de-Marne, Var, Vaucluse, Vendée.

From May 1 to November 30 each year, Santé publique France coordinates enhanced seasonal surveillance for chikungunya and dengue in metropolitan departments where the vector mosquito, Aedes albopictus, is present, in collaboration with the relevant Regional Health Agencies (ARS). Since 2016, the plan to prevent the spread of arboviruses has also included enhanced surveillance of the Zika virus (see surveillance system and partners + map below).

From May 1 to November 30, 2018:

• 189 imported cases of dengue;

• 6 imported cases of chikungunya;

• 8 locally acquired cases of dengue.

An outbreak of local transmission of the dengue virus, serotype 2, was identified in the Alpes-Maritimes (Saint-Laurent du Var) in September and October 2018. A total of 5 cases were identified.

An outbreak of local dengue transmission, serotype 1, was identified in the Hérault department (municipality of Clapiers) with 2 local cases occurring in late September and early October.

A case of dengue, serotype 1, occurred in October in the Gard department (Nîmes) with no epidemiological link to the previous outbreaks. Investigations conducted immediately upon reporting the case did not identify any other cases. Epidemiological
investigations were initiated to identify any other potential cases and to strengthen prevention and surveillance measures. Healthcare professionals in the three municipalities where the cases were identified were also made aware of the need to identify and report other individuals with suspected dengue. Mosquito control operators immediately initiated entomological investigations and undertook targeted mosquito control actions. These actions were systematically accompanied by a prior information campaign for local residents.
Localized dengue outbreaks have already occurred on several occasions in 2010, 2013, 2014, and 2015 along the French Mediterranean coast, affecting between 1 and 7 people.

They are distributed as follows:

Number of confirmed cases of chikungunya, dengue, Zika, and flavivirus* infections, by region involved in enhanced surveillance (cases counted only for departments where Aedes albopictus is present), from May 1 to November 30, 2018

* Unable to determine whether the infection was West Nile or dengue.

List of departments with Aedes albopictus populations: Ain, Aisne, Alpes-de-Haute-Provence, Alpes-Maritimes, Hautes-Alpes, Ardèche, Ariège, Aude, Aveyron, Bouches-du-Rhône, Corrèze, Corse-du-Sud, Haute-Corse, Dordogne, Drôme, Gard, Haute-Garonne, Gers, Gironde, Hérault, Indre, Isère, Landes, Lot, Lot-et-Garonne, Lozère, Maine-et-Loire, Pyrénées-Atlantiques, Hautes-Pyrénées, Pyrénées-Orientales, Bas-Rhin, Haut-Rhin, Rhône, Saône-et-Loire, Savoie, Tarn, Tarn-et-Garonne, Var, Vaucluse, Vendée, Hauts-de-Seine, Val-de-Marne.

From May 1 to November 30 each year, Santé publique France coordinates enhanced seasonal surveillance for chikungunya and dengue in metropolitan departments where the vector mosquito, Aedes albopictus, is present, in collaboration with the relevant Regional Health Agencies (ARS). Since 2016, the plan to prevent the spread of arboviruses has also included enhanced surveillance of the Zika virus (see surveillance system and partners + map below).

From May 1 to November 24, 2017:

• 137 imported cases of dengue were confirmed;

• 4 imported cases of chikungunya were confirmed;

• 15 imported cases of Zika were confirmed.

Two epidemiologically linked outbreaks of local transmission of chikungunya have been identified in a neighborhood of the town of Le Cannet-des-Maures since August 11, 2017, and in a neighborhood of the town of Taradeau since September 15, 2017. These two towns, located about ten kilometers apart, are situated in the Var department. As of October 31, 2017, 17 cases had been identified (Cannet-des-Maures: 9 confirmed and 2 probable; Taradeau: 6 confirmed). The onset date of symptoms for the last confirmed case of chikungunya in the Var department was September 9, 2017. In accordance with the arbovirus containment plan, the return to Aedes albopictus Level 1 occurred 45 days after the onset of clinical symptoms in the last reported case, on October 24, 2017 (learn more).

On September 26, 2017, an autochthonous case of Zika was identified in a resident of the Provence-Alpes-Côte d’Azur region. This was a case of sexual transmission from a partner who had been infected during a trip abroad to the Caribbean.

They are distributed as follows:

Number of confirmed cases of chikungunya, dengue, Zika, and flavivirus*, by region involved in enhanced surveillance (cases counted only for departments where Aedes albopictus is present), from May 1 to November 24, 2017

* Unable to determine whether the infection was caused by Zika or dengue.

** 15 confirmed cases and 2 probable cases.

*** Sexually transmitted infection from an imported case returning from the Caribbean

List of departments with Aedes albopictus populations: Ain, Alpes-de-Haute-Provence, Alpes-Maritimes, Ardèche, Aude, Aveyron, Bouches-du-Rhône, Corse-du-Sud, Haute-Corse, Dordogne, Drôme, Gard, Haute-Garonne, Gers, Gironde, Hérault, Isère, Landes, Lot, Lot-et-Garonne, Pyrénées-Atlantiques, Pyrénées-Orientales, Bas-Rhin, Haut-Rhin, Rhône, Saône-et-Loire, Savoie, Tarn, Tarn-et-Garonne, Var, Vaucluse, Vendée, Val-de-Marne.

From May 1 to November 30 each year, Santé publique France coordinates enhanced seasonal surveillance for chikungunya and dengue in the metropolitan departments where the vector mosquito, Aedes albopictus, is present, in collaboration with the relevant regional health agencies. Since 2016, the plan to prevent the spread of arboviruses has also included enhanced surveillance of the Zika virus (see surveillance system and partners + map below).

From May 1 to November 30, 2016:

• 167 imported cases of dengue were confirmed;

• 18 imported cases of chikungunya were confirmed;

• 450 imported cases of Zika were confirmed;

• 1 imported case of dengue/Zika co-infection was confirmed;

• 3 cases of Zika transmitted sexually were confirmed.

There have been no cases of local vector-borne transmission.

They are distributed as follows:

Number of confirmed cases of chikungunya, dengue, and Zika, by region subject to enhanced surveillance (cases counted only for departments at Level 1), from May 1 to November 30, 2016*

^a List of Level 1 departments: Ain, Alpes-de-Haute-Provence, Alpes-Maritimes, Ardèche, Aude, Bouches-du-Rhône, Corse-du-Sud, Haute-Corse, Dordogne, Drôme, Gard, Haute-Garonne, Gironde, Hérault, Isère, Landes, Lot, Lot-et-Garonne, Pyrénées-Atlantiques, Pyrénées-Orientales, Bas-Rhin, Rhône, Saône-et-Loire, Savoie, Tarn, Tarn-et-Garonne, Var, Vaucluse, Vendée, Val-de-Marne.

^b Dengue-Zika co-infection.

^c Serological results that do not allow for distinguishing between dengue and Zika.

* (Data consolidated as of December 22, 2016)

From May 1 to November 30 each year, the InVS coordinates enhanced seasonal surveillance for chikungunya and dengue in metropolitan departments where the vector mosquito, Aedes albopictus, is present, in collaboration with the relevant Regional Health Agencies (ARS) (see surveillance system and partners).

Since September 2015, the departments of Tarn and Vendée have been included in the list of departments where the Aedes albopictus mosquito is established. The number of departments covered by the regional enhanced surveillance system has thus risen to 22.

From May 1 to November 27, 2015:

• 127 imported cases of dengue were confirmed;

• 30 imported cases of chikungunya were confirmed;

• 6 locally acquired cases of dengue were confirmed.

On August 19, 2015, two locally acquired cases of dengue were confirmed within the same family in Nîmes (Gard department, Languedoc-Roussillon region).
As of September 25, 2015, epidemiological investigations identified 4 locally acquired dengue cases linked to this outbreak, bringing the total number of locally acquired cases to 6.

In accordance with the national plan to “prevent the spread of chikungunya and dengue” and to limit transmission of the virus by the Aedes albopictus mosquito, epidemiological and entomological investigations, as well as mosquito control measures, were immediately implemented by the ARS, the Cire, and the Interdepartmental Agreement for Mosquito Control along the Mediterranean Coast (EID Méditerranée).
Information was disseminated to healthcare professionals, medical laboratories, and healthcare facilities, as well as to town halls and local authorities in the affected areas.

For more information: http://www.ars.languedocroussillon.sante.fr

They are distributed as follows:

Number of confirmed cases of chikungunya and dengue, by region under enhanced surveillance, from May 1 to November 27, 2015

Department and year of establishment of the Aedes albopictus vector in mainland France

From May 1 to November 30, 2014 => 1,492 suspected cases of dengue or chikungunya were reported. Of these, the following were confirmed:

• 163 imported cases of dengue;

• 443 imported cases of chikungunya;

• 6 imported co-infected cases;

• 4 locally acquired cases of dengue;

• 11 locally acquired cases of chikungunya.

• Four locally transmitted cases of dengue have been confirmed by the National Reference Center (CNR) for Arboviruses in the Provence-Alpes-Côte d’Azur region. The first two, confirmed on August 20 and September 11, occurred in the Var department. They are not linked because they involve different serotypes (serotype 1 and serotype 2). The third and fourth cases, confirmed on September 18 and October 3 in the Bouches-du-Rhône department, are linked and constitute an outbreak. The two patients live in the same neighborhood and have the same dengue serotype: serotype 2. They are not linked to the cases in the Var.

• The 11 locally acquired cases of chikungunya were identified in the same neighborhood of Montpellier (Hérault) and constitute a transmission cluster. The first five cases in this cluster were confirmed by the CNR for arboviruses on October 20 and 22. Epidemiological investigations identified 6 locally acquired cases linked to this cluster, bringing the total to 11 locally acquired cases.

In accordance with the national plan to “prevent the spread of chikungunya and dengue” and to limit the transmission of these viruses by the Aedes albopictus mosquito, epidemiological and entomological investigations, as well as mosquito control measures, were immediately implemented by the relevant Regional Health Agencies (ARS) and Regional Health Centers (CIRE), and the Interdepartmental Agreement for Mosquito Control on the Mediterranean Coast (EID Méditerranée) regarding the locally acquired cases of dengue and chikungunya. Health professionals, medical laboratories, and healthcare facilities
, as well as town halls and local authorities, were notified in the affected areas.

The alert has been lifted in the departments of Var, Bouches-du-Rhône, and Hérault.

For more information: http://www.ars.paca.sante.fr/ and http://www.ars.languedocroussillon.sante.fr

The enhanced surveillance program for chikungunya and dengue ended on November 30 for the year 2014.

Pending validation of the latest laboratory results, the cases are distributed as follows:

Number of suspected and confirmed cases of chikungunya and dengue, by enhanced surveillance region, from May 1 to November 30, 2014

Department and year of establishment of the Aedes albopictus vector in mainland France

From May 1, 2013, to November 30, 2013, in the 17 departments of southern France under enhanced surveillance:

429 suspected cases of dengue or chikungunya were reported. Among them:

• 188 imported cases of dengue were confirmed;

• 2 imported cases of chikungunya were confirmed.

A single case of autochthonous dengue (local transmission) was diagnosed in the Bouches-du-Rhône department on October 21, 2013. The individual had not traveled to an area where dengue is circulating in the 15 days prior to the onset of symptoms.

Epidemiological, virological, and entomological investigations were immediately conducted by the ARS, the Cire, the National Reference Center for Arboviruses, and the Interdepartmental Mosquito Control Association (EID Méditerranée). Information campaigns targeting town halls, primary care physicians, and medical laboratories were carried out in the area where the affected person resides. Active case finding in the area and among physicians and laboratories has not identified any other cases to date.
As a preventive measure, and although field investigations have shown a significant decrease in the mosquito population, vector control treatment has been applied in the field.
The risk of further local cases has been assessed as minimal, due to the low prevalence of the Aedes albopictus mosquito (tiger mosquito) in the area and the onset of winter. To date, investigations have not identified the precise source of this infection.

The cases are distributed as follows:

Number of suspected and confirmed cases of chikungunya and dengue, by enhanced surveillance region, from May 1 to November 30, 2013

The 17 departments where the Aedes albopictus mosquito was present in 2013

Alpes-Maritimes, Alpes-de-Haute-Provence, Var, Haute-Corse, Corse-du-Sud, Bouches-du-Rhône, Vaucluse, Gard, Hérault, Aude, Pyrénées-Orientales, Haute-Garonne, Lot-et-Garonne, Drôme, Ardèche, Isère, and Rhône.