The provincial People’s Committee announced the deadly A/H5N1 virulent strain was found on thousands of ducks raised by local farmers in Yen Phong and Tien Du districts, Tu Son Town and Bac Ninh City.

Local veterinarians quarantined and disinfected the affected farms and vaccinated all poultry.

Check points have been established in high-risk areas to prevent the slaughtering, transport and trading of sick poultry.

So far, more than 4,000 infected chickens and ducks in Bac Ninh have been culled.

Experts warned of a high risk of a bird flu recurrence in Vietnam as there is an increasing consumer demand for poultry and its related products during the upcoming Lunar New Year (Tet) holiday. Cold weather also enables the deadly flu virus to spread far and wide.

via News VietNamNet.

Backs up what I have been saying for about 5 years now into my research of avian influenza from a large systems point of view.