Along with forcing the euthanizing of millions of birds, this year’s outbreak of avian influenza cost Iowa nearly 8,500 jobs, more than $1.2 billion in reduced economic output and more than $425 million in lost value-added income, as well as significant reductions in federal, state and local tax revenues, according to a new report commissioned by the Iowa Farm Bureau Federation.

There have been no new cases of avian flu in...