A Washington state resident has become the first recorded human case of the rare H5N5 avian influenza strain, marking a significant development in global health monitoring. The individual, described as an older adult with pre-existing health conditions, succumbed to the virus after being hospitalized earlier this month. The Washington State Department of Health confirmed the diagnosis, which was subsequently verified by the US Centers for Disease Control and Prevention (CDC).
Health officials emphasized that the risk to the general public remains low, as no other cases have been reported, and there is no evidence of human-to-human transmission. The patient reportedly kept a backyard flock of mixed domestic birds, which is believed to be the source of the infection.
This incident marks the second human fatality linked to avian influenza in the United States this year, following a death from the H5N1 strain in Louisiana in January. Globally, the World Health Organization (WHO) has documented over 1,000 human cases of bird flu across 25 countries since 2003, encompassing all known strains of the virus. The CDC has recorded more than 70 human cases of bird flu in the US this year alone, highlighting the ongoing need for vigilance in monitoring zoonotic diseases.