A third man has died from a new strain of Bird flu in China that has previously not been known to infect humans. This latest casualty to the H7N9 virus follows the deaths of two other Chinese citizens in March 2013.

According to the Xinhua news agency in China, a total of nine confirmed cases of the new strain have been recorded in the country. A middle aged woman is also seriously ill in hospital after catching the virus.

China’s National Health and Family Planning Commission have reported that the two men who died in Shanghai became ill with coughs and fevers before developing pneumonia.

The commission’s experts confirmed Saturday that the cause of death has been as a result of the  H7N9 strain of avian flu not thought to have been transmitted to humans in the past. Scientists have also confirmed is this new mutation of the H7N9 strain appears to have made the transmission of the virus much easier among other livestock such pigs. This mutation is likely to cause a growing number of human cases of this new deadly strain.

At present there is no vaccine to prevent infection from this deadly strain. Detection has been made even more troublesome as the strain does not show any symptoms in poultry, making it hard to track.