The Centre for Health Protection is monitoring three additional human avian influenza cases, in Zhejiang, Hunan and Jiangsu.
The Zhejiang case involves a man aged 61 who is now in critical condition in hospital.
The case in Hunan is a man aged 38 while that in Jiangsu is a man aged 53. Both are in hospital.
As of yesterday, 320 H7N9 cases have been confirmed in the Mainland.
