BBC NEWS | Asia-Pacific | Fresh warning on China bird flu

BBC NEWS | Asia-Pacific | Fresh warning on China bird flu:

"Hong Kong's secretary for food and health, Dr York Chow, said this was a cause for concern.

'There are two main areas we are concerned about: one is that if there is no avian flu outbreak in poultry and yet there are human cases, does this mean the virus has changed?

'Secondly, we are worried about whether there are more so-called 'slightly infected' chickens that actually might be carrying the virus and transmitting the disease, and yet do not show any symptoms or die from those illnesses,' Dr Chow said."