Chinese authorities have announced four new cases of a new strain of bird-flu, taking the total to seven.
The virus has killed two people and the others are in a critical condition.
The World Health Organisation said there is no indication the H7N9 strain can be transmitted between humans but the source of the infection is being investigated.
Li Yanting of the Shangai Municipal Center for Disease said:
“Food has to be cleaned and thoroughly cooked. People should not eat half-cooked food. Some people like to eat half-cooked boiled chicken even with fresh blood on it. It’s very dangerous.”
The four new victims – in the eastern Jiangsu province next to Shanghai – are said to be between 32 and 83-years-old but only one, a woman of 45 had worked closely with the birds.
Experts say the strain appears not to be highly contagious so there is no major cause for alarm.