A 41-year-old man in China's eastern province of Jiangsu has been confirmed as the first human case of infection with a rare strain of bird flu known as H10N3, Beijing's National Health Commission (NHC) has said.

The man, a resident of the city of Zhenjiang, was hospitalised on April 28 and diagnosed with H10N3 on May 28, the health commission said on Tuesday, adding that his condition is stable.