Influenza A virus subtype H7N9

They report that the previously circulating strain mutated and is now more contagious to humans.

China reported the world's first human infection of the H10N3 bird flu strain on June 1 but said the risk of it spreading widely among people was low.

A 41-year-old man was admitted to hospital with fever symptoms in the eastern city of Zhenjiang on April 28 and was diagnosed with H10N3 a month later, China's National Health Commission (NHC) said in an online statement.

Hong Kong reported its first death from the newly identified coronavirus on Feb. 4, the second outside mainland China from an outbreak that has killed more than 420 people, spread around the world and raised fears for global economic growth.   

China could be facing the worst bout of bird flu to hit the country in a century, with Avian Influenza A(H7N9) accounting for the deaths of 79 people in January from the 192 human cases reported so far.