The World Health Organization said on Tuesday that the National Health and Family Planning Commission of China confirmed nine additional laboratory-confirmed human cases of avian influenza A H7N9.
The age range of the nine cases is 4 to 84 years of age, and six are male. The cases were reported in Anhui with two cases, Guangdong with five cases, Hunan with one case and Jiangsu with one case.
Of the nine cases, two are in critical condition, three are in severe condition, one has died and three are unknown. Three reported exposure to live poultry.
Information from NHFPC showed the cases became ill in late January or early February. WHO said investigations are currently taking place.
Sporadic human cases are expected to continue in affected and neighboring areas. WHO said the international human-to-human transmission of the virus by travelers is expected to stay low until the virus adapts itself.
WHO said the Chinese government has increased surveillance and analysis, reinforced case management and treatment and informed the public of the associated risks.
WHO does not advise special screening at points of entry for travelers, although they should practice good hygiene and avoid live poultry and poultry markets.
The viral infection does not show symptoms in infected poultry, and WHO said further surveillance of transmission would be necessary.