On the 15th of April 2026, the World Organisation for Animal Health (WOAH) approved and published the Belgium’s self-declaration to regain its status as free from highly pathogenic avian influenza virus in poultry.
The HPAI free status at the WOAH level was regained on the 23rd of February 2026 in accordance with the rules in force of the WOAH, 28 days after the end of the stamping out (i.e. cleaning and disinfection of the last affected establishment) on the 26th of January 2025.
No further outbreaks have occurred in poultry since then, which, together with the other measures and in application of Article 10.4.6 of the Terrestrial Code, allows Belgium to regain its status as free from highly pathogenic avian influenza infection.
For more detailed information, please consult the document: self-declaration "HPAI free statut" published on the WOAH website (currently only available in French).
Introduction
Avian Influenza (AI) is a highly contagious viral disease to which all poultry species are susceptible.
Infection of poultry can occur through direct contact with sick animals, or through exposure to contaminated materials. Wild birds may be an important source of contamination as they are often carriers of the virus without being visibly ill.
On November 15th of 2021, an 'increased risk period' was declared in Belgium following the detection of highly pathogenic avian influenza (HPAI) virus subtype H5N1 in a wild bird on the territory. Additional biosecurity measures were therefore taken to protect the Belgian flock from the virus.
Since then, the disease has continued to circulate, and multiple cases of HPAI subtype H5 have been identified in wild birds and poultry in Belgium and in neighbouring countries. The increased risk period is currently still in force but the measures were adapted depending on the evolution of the situation. Due to the more favourable epidemiological situation, the measures were softened on the 16th of April 2026.
For more details, see “Situation in Belgium”.