The patient was not infected via work at a poultry or cattle facility, but rather at their own home. They had exposure to sick and dead birds in a backyard poultry flock, according to the health agency. This marks the first confirmed human case of avian influenza linked to a backyard flock in the U.S., per the CDC.

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in that state and causing sporadic illnesses in people in the U.S.

California announces a state of emergency after an outbreak of bird flu, H5N1 is primarily spread amongst wild birds and poultry on farms – but is now being seen in humans

At least 61 people in the US have contracted bird flu amid outbreaks in poultry and dairy cows. What are the symptoms? What to know about highly pathogenic avian influenza, aka, H5N1.