A person in Yakima County, Washington, has died from complications of bird flu, STAT reports. The resident was exposed to avian influenza at a dairy with infected cattle and had been in hospital, county health officials said. The person died on Sunday.

Health officials said the person had underlying health conditions, the Guardian reports. They did not release the person's identity, and the Seattle Times reports that they declined to give the person's age or gender.

The Centers for Disease Control and Prevention said the person was infected with H5N1, STAT reports. "This case does not change CDC's public health risk assessment from A(H5) viruses, which continues to be low," CDC spokesperson Emily Hilliard said, according to the Seattle Times.

County officials have reported that 33 dairy herds have tested positive for H5N1, STAT reports. The Guardian reports that the positive tests have come since early October.

Two other Yakima County residents have tested positive for bird flu in the past three weeks after exposure at dairy farms, the Seattle Times reports. Neither has been in hospital, the Seattle Times says. All three are dairy workers.

Human-to-human spread of bird flu is "extremely rare and has never been documented in the United States," county officials said, according to the Guardian.

"Our hearts go out to the individual's family and loved ones during this difficult time," county health officer Dr Dave Atteberry said, the Seattle Times reports.

Pasteurized milk, cooked meat and dairy products are still safe to eat, the state agriculture department says, according to the Seattle Times.