|All new cases detected over the past few days are Vietnamese citizens returning from epidemic-hit countries. There is no possibility that they will spread the virus among the community as they were quarantined upon their arrival
The five positive cases are Vietnamese citizens who returned from epidemic-hit countries.
One of them illegally crossed the south-western border from Cambodian into Vietnam, and was only quarantined one day after entering Tay Ninh province - the patient's native home - in early May. Some 17 people who had close contact with the patient were isolated for medical observation.
All other imported cases were placed in quarantine for medical observation as soon as they flew to Vietnam.
As of May 17 morning, Vietnam had confirmed 318 coronavirus patients, of whom 260 had recovered and been discharged from hospital.
The remaining 58 cases are under treatment with 12 having tested negative for the SARS-CoV-2 virus that causes the COVID-19 disease.
May 17 marks the 31st day Vietnam has seen no new locally transmitted infections.
The most severe case, the British patient dubbed as patient 91, showed a slight improvement at Ho Chi Minh City-based Hospital of Tropical Diseases. He has tested negative five times and has now stopped pleural drainage.
With 90% of his lungs damaged, doctors say a lung transplant is the only solution to save the patient. Doctors are seeking sources of lung for the surgery, with priority given to brain-dead people.