Emergence units

In the event of an epidemic outbreak due to the emergence or re-emergence of a pathogen, in France or anywhere else in the world, the agency triggers a dedicated levelled procedure in order to respond proportionately to health crises.

Last updated on 06 November 2025

Find out more about the Emergence plan

Active Emergence units


Avian Influenza A (H5N1) Emergence Unit

Status: active – level 1

Filovirus Emergence unit

Status: active – level 1

Chikungunya Emergence unit

Status: active – level 1

Past Emergence units


West Nile Emergence unit

Status: discontinued since November 2025 – level 1

Mpox Emergence unit

Status: discontinued since September 2025- level 1

Oropouche virus Emergence unit

Status: discontinued since January 2025 – level 1

Multi-country mpox Emergence unit (2022)

Status: discontinued since May 2023 – level 2

Covid-19 Emergence Unit

Status: suspended (July 2022) – level 3

Marburg virus disease Emergence Unit

Status: suspended since 9 June 2023 – level 1

Poliomyelitis Emergence Unit

Status: suspended (November 2022) – level 1

Acute hepatitis of unknown origin Emergence Unit

Status: suspended (August 2022) – level 1

Ebola (Sudan Strain) Emergence Unit

Status: suspended since January 2023 – level 1