The virus spreads easily by means of direct contact (with live infected animals) and indirect contact (in the air, on the wind, on vehicles, people and agricultural equipment, in animal products or animal feed, and via other species that are not susceptible, such as horses and birds).
Le virus se propage facilement par contact direct (animaux vivants contaminés) et indirect (air, vent, véhicules, personnes, matériel agricole, produits d'origine animale ou aliments pour animaux, autres espèces non réceptives tels les chevaux ou les oiseaux).