"The father of an 11-year-old girl who died from avian influenza in Cambodia this week has been diagnosed with the virus, officials said, stoking concerns about the possibility of another animal-borne virus affecting humans.
Eleven more people who had been in close contact with the girl have undergone lab testing for H5N1, said Or Vandine, who is Cambodia’s Secretary of State as well as spokesperson for the Ministry of Health. The girl’s 49-year-old father is the only one who tested positive. An investigation is ongoing, she said.
There hasn’t been any indication that the virus is spreading from person-to-person, officials said. The patient who died was exposed to sick birds before she became infected. Four of her close contacts had begun exhibiting signs of illness, according to reports in media outlets including the Khmer Times and the Voice of Vietnam."
Khmer Times: https://www.khmertimeskh.com/501244375/after-death-of-girl-yesterday-12-more-detected-with-h5n1-bird-flu/
Edit: Title changed to add uncertainty as I'm not sure of the import of the four symptomatic individuals. Wording of Bloomberg article implies that the Secretary of State's speech indicates that the test results of the close contacts came in and and were negative, but Khmer Times article states "The Secretary of State stated that four of the affected people have begun to show symptoms", so I'm unclear on the actual situation.
Edit: Title changed again to reflect current situation: Seems clear that only one of the 12 samples (the father's) has been confirmed as positive.
https://www.khmertimeskh.com/501245030/2nd-case-of-h5n1-bird-flu-in-cambodia-confirmed/
Looks like everyone except the two confirmed cases (father and daughter) tested negative.
I am >98% certain this was due to a shared exposure to an infected bird rather than human-to-human transmission (base rate + no meaningful evidence otherwise). Similarly, at no point did I think there was a >5% chance this would turn out to be human-to-human transmission.
I would recommend that we do not post H5N1 cases without evidence of mammal-to-mammal transmission or very large clusters. We should expect to see a lot and they should not meaningfully update our view of the situation.