The latest confirmed case were in the same flight from Wuhan, China, to Vietnam and had close contact with three previous patients detected on Jan. 30

The cases are currently limited to four provinces out of 63 in Vietnam.

On Saturday, Vietnam declared a public health emergency over the coronavirus epidemic and said it would halt all flights to and from mainland China.

The government advised its citizens to limit large gatherings. Trade and exchanges with China are discouraged during this time.

By Phuong Nguyen - February 3, 2020