China has confirmed its first known human case of the H3N8 strain of avian flu, but health authorities say the risk of widespread transmission among people stands low. H3N8 is known to have been circulating since 2002 after first emerging in North American waterfowl. It is known to infect horses, dogs and seals, but has not previously been detected in humans.
The first-ever instance of H3N8 bird flu infecting a human has been recorded in China. H3N8 is a subtype of the species Influenza A virus that is capable of crossing the species barrier.