The death comes at a time when the H5N1 virus has recently undergone an unusual mutation that is causing concern to the World Health Organization.

The first person to have a severe case of H5N1 bird flu in the United States has died, according to the Louisiana Department of Health.

The first patient hospitalized with avian influenza in the United States has died in Louisiana, the state's department of health announced Monday.

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The LDH revealed that the patient was over age 65, had underlying medical conditions and contracted bird flu after exposure to both wild birds and a non-commercial backyard flock.

Another massive winter storm is forecast to pummel the southern and eastern U.S., with impacts from Texas to the Carolinas.

The patient, who was older than 65 and had underlying medical conditions, was hospitalized weeks ago in critical condition with severe respiratory illness.

The first Louisiana patient with bird flu has died, officials with the state health department said Monday. The death is the first U.S. H5N1-related human death, the agency said.

The first person has died of bird flu in the United States, the Louisiana Department of Health confirmed on Monday. The patient, who was exposed to non-commercial backyard flock and wild birds, was over age 65 and had underlying medical conditions, officials said.

NEW YORK (AP) — The first U.S. bird flu death has been reported — a person in Louisiana who had been hospitalized with severe respiratory symptoms.

The deceased was over 65 and had other medical conditions, state officials said. A Louisiana patient who had been hospitalized with severe bird flu has died, the first such fatality in the United States, state health officials reported on Monday.

The risk of catching H5N1 bird flu remains low, and there have been no reported cases of person-to-person spread.