Anhui Province:
A two-year-old boy with onset on August 5, 2025.
Chongqing Municipality:
A six-year-old boy with onset on July 30, 2025.
Hunan Province:
A two-year-old boy with onset on August 21, 2025.
Sichuan Province:
A one-year-old boy with onset on July 28, 2025.

Molecular tracing and evolutionary characteristics analysis of H9N2 avian influenza virus from two human infections. China Tropical Medicine, Aug 2025, Vol.25, No.8