Illustrative photo.
The woman first tested negative for coronavirus on October 16 but her second test on October 19 came back positive.
The patient is now being treated at a healthcare centre in Ninh Binh.
Two other new patients are a 33-year-old woman and her eight-month-old son who returned from Angola at Van Don Airport on October 20. They were sent to a quarantine area in Bac Giang Province upon arrival and tested positive for coronavirus the same day.
These two patients are being treated at the Hanoi-based National Hospital for Tropical Diseases.
As of 6pm on October 21, a total of 1,046 Covid-19 patients had recovered and been discharged from hospital. There have been 35 deaths, most of them being the elderly with serious underlying diseases.
The country has gone 49 days without reporting any new case in the community.
At present, 13,929 people who had close contact with Covid-19 patients or returned from virus-hit areas are being monitored at hospitals, quarantine facilities, and at home.
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