Sichuan Province:
A 1-year-old boy with onset on November 14, 2023.

A 74-year-old woman with onset on November 5, 2023.

On 6 December 2023, China notified WHO of two laboratory-confirmed A(H9N2) virus infections detected in Sichuan province. Both cases are from the same village in Sichuan province and are neighbours. The first case detected is a one-year-old male who had an onset of mild illness on 14 November 2023. A sample collected on 14 November as part of routine influenza-like illness surveillance was confirmed A(H9N2)-positive on 18 November. The second case was identified during the contact tracing efforts following the detection of the first case and is a 74-year-old female who had onset of mild illness on 5 November. A sample collected on 18 November was confirmed A(H9N2)-positive on the same day. Neither case was hospitalized, and both were exposed to backyard poultry at the residence of the second case. Backyard samples collected from the second case’s house tested positive for influenza A(H9) viruses. All other close contacts of these two cases tested negative for influenza A(H5), A(H7), and A(H9) viruses. Information received thus far suggests separate spillover events from infected poultry to the two human cases although limited human-tohuman transmission cannot be excluded.