Vietnam’s Ministry of Health confirmed two imported COVID-19 cases on Sunday, both quarantined upon arrival.
The first patient is a 17-year-old Ukrainian boy who entered Vietnam from the U.S. via South Korea.
He touched down at Tan Son Nhat International Airport in Ho Chi Minh City on board flight KE683Y on Friday last week.
The boy was sent to quarantine in Phan Thiet, Binh Thuan Province, about 200km from Ho Chi Minh City, upon landing.
His COVID-19 test returned positive at the Pasteur Institute in Nha Trang, a beach city in south-central Vietnam, on Saturday.
He is being isolated for treatment at a hospital in Binh Thuan.
The second patient is 22 years old and hails from Da Nang.
She landed at Da Nang International Airport aboard flight VN5062 from Russia on December 6 and was quarantined upon entry in the same city.
Her first two coronavirus tests came back negative on December 6 and 9 but a third test returned positive on Saturday.
She is treated for COVID-19 at the Da Nang Hospital for Lung Diseases.
Three other passengers, now in quarantine in Da Nang, on her flight had been diagnosed with COVID-19 before.
Vietnam has registered 1,413 coronavirus patients as of Monday morning, with 1,269 recoveries and 35 virus-related fatalities, according to the health ministry.
The country has gone almost three weeks without detecting any community transmission after four domestic infections were confirmed in Ho Chi Minh City in late November and early this month.