The Hanoi Centre for Disease Control and Prevent (CDC Hanoi) has announced all nine individuals who came into close contact with a Hanoian man suspected of being positive for COVID-19 in Japan have tested negative for the virus.

Despite receiving the haul of negative test results, each of the nine people will still be required to remain under quarantine at home for a further 14 days, with CDC Hanoi moving to swiftly sanitise the surrounding areas.

This comes after a 23-year-old Vietnamese national who had flown from Hanoi to Japan on flight NH898 had tested positive for COVID-19 after undergoing a quick test upon arrival at Haneda International Airport in Tokyo on September 30.

The man will be tested for real-time polymerase chain reaction (RT-PCR) over the course of the next six days.

According to CDC Hanoi, the Vietnamese patient had not come into contact with any COVID-19 patients and had not been to any infected areas before flying to Japan.

Ths is the 10th positive case detected abroad after flying from Vietnam. Nine other cases were later confirmed to be negative after undergoing RT-PCR tests.