A veterinary meteorological decision-support system, VetMet, is developed in collaboration between Danish meteorological and veterinary research institutes and authorities. The system, which is implemented at the Danish Meteorological Institute, is used by the Danish Veterinary and Food Administration, which has the responsibility for prevention and control of animal diseases in Denmark. By estimating the risk of atmospheric spread of airborne animal diseases, including first of all foot-and-mouth disease, VetMet improves the preparedness and the disease eradication. The Internet-based system will be used for decision support regarding establishment of surveillance and eradication zones. VetMet can describe both local spread of infectious airborne diseases between neighbouring farms and long-range dispersion, including disease spread to or from other European countries.