Infected birds shed the virus in their feces, saliva and mucous, while affected animals can also shed the virus through respiratory secretions and other bodily fluids like raw cow milk.

Birds shed the virus through their saliva, mucus and feces, and it can become airborne when their litter and feathers are churned up in barns, particularly during culling operations.

However, the CDC has warned people to “avoid exposure whenever possible,” saying that infected birds shed avian influenza A viruses in their saliva, mucous, and faeces, while other infected animals ...

There have been reports of bird flu cases throughout the U.S. and one confirmed case in Louisiana. Here's what the CDC says about bird flu infections.