Vietnam’s Ministry of Health announced five imported COVID-19 cases on Tuesday, all Vietnamese repatriates.
Patient 1,516 is a 24-year-old Vietnamese woman who returned from Japan on board flight QH9417 on Sunday.
She was quarantined in Thanh Hoa Province after landing at Noi Bai International Airport in Hanoi.
The Thanh Hoa Center for Disease Control diagnosed her with COVID-19 on Monday.
The patient is being isolated for treatment in Hanoi.
Patient 1,517 is a 24-year-old Vietnamese returnee from the U.S.
He had a connecting flight in South Korea before touching down aboard flight VN441 at Cam Ranh International Airport in Khanh Hoa Province on January 1. He was sent to quarantine in nearby Phu Yen Province upon arrival.
He tested negative for the virus on January 1 and 6 before retesting positive on Monday at Phu Yen General Hospital and the Pasteur Institute in Nha Trang City.
The patient is being treated at Phu Yen General Hospital.
Eleven passengers on his flight had been confirmed as COVID-19 patients prior to his diagnosis.
The other three Vietnamese patients entered the country via Moc Bai International Border Gate, which lies along the Vietnam-Cambodia border, in Tay Ninh Province on January 7.
They were quarantined upon entry. Their coronavirus tests came back positive at the Tay Ninh Center for Disease Control on January 12.
The three are in treatment at Tay Ninh General Hospital.
Vietnam has confirmed 1,520 coronavirus cases as of Tuesday night, with 1,361 recoveries and 35 virus-related deaths, according to the Ministry of Health.
It has detected zero local infections since December 2.
The Southeast Asian country is sealing its borders to all international arrivals but it still allows entry to skilled workers, experts, diplomats, and Vietnamese repatriates, who are all subject to mandatory quarantine upon arrival.