Woman 73 years old, Jiangxi Province , China, developed a typical case of the flu with fever, cough and chest tightness in late November 2013 and was quickly admitted to the hospital, where despite the treatment with antibiotics and antivirals, his health worsened , he developed severe pneumonia. He died on December 9 , nine days after the first symptoms appear .

Further analysis showed that women did not have the seasonal flu virus , but was H10N8 infected with a flu virus that was previously detected in wild and domestic birds , but had never found in humans. In late January of this year , were reported H10N8 another case of a woman of 55 who lived in the same province China, whose health was stable, according to the World Health Organization .

Both women had been on the market poultry before contracting the disease , however , could not be confirmed the source of infection. None of the people who were in close contact with them developed flu symptoms, according to WHO.

Based on these data, the WHO states that , for now , there is no evidence that H10N8 can spread from person to person.

The H10N8 is the latest bird flu virus passing to humans . In May 2013 , a woman in Taiwan was the first person to be infected with a strain of bird flu known as H6N1 . And almost a year ago , the first cases were discovered in human H7N9 avian influenza .

Predict if the avian flu pandemics will cause in the future is a challenge , as all researchers.

The H10N8 virus detected in the deceased woman is H10N8 genetically different birds found . Different strains of influenza virus genes can be exchanged many times H10N8 creating the new strain . However, the deceased also had several chronic diseases such as coronary heart disease, which may have contributed to the severity of their disease, according to the report of WHO.

Photo of Andrei Niemimäki from Turku, Finland (Friends ) [CC-BY-SA-2.0], via Wikimedia Commons