Three pigs exhibited at the Minnesota State Fair this summer tested positive for the H1N1 virus, a preliminary result Friday confirmed and marked the first time the worrisome virus has been found in U.S. animals.
Still, the results spark a new worry — that the virus could mutate into a more deadly form as it moves between species. Because the tests were confidential, not even the farmers have been notified which animals were infected.That sounds like a plan and a good way to contain the outbreak.
State officials suspect the pigs caught the virus from fairgoers.