Three more human cases of H7N9 bird flu have added the tally to 28 in south China's Guangdong Province since the start of the year, according to the local authorities.
Guangdong, which borders Hong Kong, has entered the high-incidence period for bird flu, which usually crops up in winter and spring seasons.
AdvertisementThe provincial health and family planning commission in a statement said that the three cases were reported last Wednesday in cities of Shenzhen, Foshan and Meizhou.
While a 42-year-old woman from Foshan was in critical condition, a 59-year-old man from Meizhou and a 21-year-old man from Shenzhen were in stable condition, the authorities said
Several cities in Guangdong have taken measures to restrict live poultry trade to curb the spread of the disease, raising concerns about the impact on the industry.
Shanghai, Fujian, Jiangxi and Zhejiang in east China have all reported human cases of H7N9 this winter, in addition to Guangdong.
H7N9 is a bird flu strain first reported to have infected humans in 2013.