Vietnam has temporarily contained bird flu with no new outbreak reported over the past 23 days, the Veterinary Department said on December 23.

The department, however, warned localities that there is a high risk of bird flu recurrence as the winter sets in.

Up to now, over 147 million fowls have been vaccinated and 35 out of 63 cities and provinces nationwide have completed the second vaccination campaign this year.

On the same day, the Health Department of central Da Nang city held an exercise on fighting avian influenza infection on humans.

At Da Nang Airport, a relevant workforce was required to deal with a case that three foreigners were supposed to have specific symptoms of the H5N1 infection such as high fever and tiredness. This was part of the effort to control the spread of the disease brought into the country by passengers.