In addition, surveillance and laboratory testing in the holding keeping the vaccinated mallard ducks and unvaccinated sentinel birds should be carried out as set out in the preventive vaccination plan.
Lisaks sellele tuleks vaktsineeritud sinikaelparte ja vaktsineerimata sentinellilinde pidavate ettevõtete suhtes teostada järelevalvet ja laborikatseid, nagu on sätestatud profülaktilise vaktsineerimise kavas.