The disease was confirmed in a flock of poultry raised by a family in Cap Tien commune, Son Duong district, Tuyen Quang province on February 26.

On the previous day, an outbreak of bird flu occurred on two family poultry farms in Nguyen Trai commune, Ha Giang province. As of March 1, the total number of poultry found to be infected with the disease in these two households was up to 100 heads of chicken. Most of them died.

Now, health care agencies are coordinating with local authorities to proactively carry out measures to prevent and curb the spread of the disease.

At present, the disease has spread to 7 provinces nationwide. Ca Mau, Dien Bien, Soc Trang, Nam Dinh and Khanh Hoa have not yet passed the 21-day deadline without any new outbreak.

In addition, an outbreak of foot-and-mouth disease is occurring in four provinces-Nghe An, Dien Bien, Tien Giang and Son La.