Influenza viruses lead to economic losses, especially in fattening herds, as fattening performance is reduced for several days or animals may even lose weight. Slaughter weight is reduced and/or the duration of fattening is extended accordingly. In sow herds, impaired reproductive performance and the birth of sickly piglets may lead to higher economic losses.
The occurrence of secondary infections leads to further economic losses due to the veterinary treatment required for the animals. Treated animals do not thrive as expected, which adds a further economic loss.
Alongside the economic losses, it should also be borne in mind that all infections constitute an impairment of animal health and hence of animal welfare.
Information about zoonotic potential and other measures can be found here.