As response teams work to depopulate and clean up Iowa farms affected by the avian flu, biosecurity is top of mind, they said. Even after a farm tests positive for avian flu, there are biosecurity protocols in place to try to limit the spread of the disease.

Neighbors and passers-by can help in those efforts by simply staying away from farms that have tested positive for avian flu.

"Biosecurity is important to cut the transmission of this disease," said Kyoung-Jin Yoon, professor in veterinary diagnostic and production animal...