Key Points

From May 1 to November 30 each year, Santé publique France coordinates, in conjunction with the relevant Regional Health Agencies (ARS), enhanced seasonal surveillance of chikungunya, dengue, and Zika in mainland France, where the vector mosquito, Aedes albopictus, is expanding its range.

In Occitanie, since May 1, 2021, 23 imported cases of dengue have been confirmed: the dengue cases were returning from Réunion (19), Djibouti (1), French Guiana (1), India (1), and Côte d’Ivoire (1).

No cases of chikungunya or Zika have been identified. To limit the risk of local transmission, 28 entomological surveys and 17 vector control treatments were carried out in the vicinity of these cases.

Nationwide, from May 1 to November 19, 2021, the following were confirmed:

• 157 imported cases of dengue, including 105 from Réunion

• 3 imported cases of chikungunya

• 0 imported cases of Zika

One confirmed indigenous case of Flavivirus infection was recently detected in the Hérault department.