Cambodia’s health ministry has reported the country’s fifth human H5N1 avian flu case of the year. The patient is a 65-year-old woman who had no known contact with poultry, according to an official post on its Facebook page translated and posted by Avian Flu Diary, an infectious disease news blog.

Her infection was confirmed by the Pasteur Institute in Cambodia on May 12, and she is still receiving medical care. The woman is from Takeo province in the far southern part of the country.
One of her neighbors owns 10 chickens, but no deaths or illnesses were reported in the flock.
Earlier cases this year were all fatal
Cambodia’s four earlier cases this year were all fatal. The last was reported in late May, in an 11-year-old boy from Kampong Speu province in the south central region.
The country has been experiencing a rise in human H5N1 infections since late 2023. Some have been linked to a novel reassortment between an older 2.3.2.1c clade known to circulate in Southeast Asia's poultry and genes from the newer 2.3.4.4b clade spreading globally. So far, it's not known what clade infected the woman or the boy.