The cases, 12 imported and eight domestic, are all Vietnamese.

This brings the national count to 2,962, with 1,595 domestically-infected cases.

A total of 40,563 people who had close contact with COVID-19 patients or arrived from pandemic-hit areas are being quarantined nationwide.

Meanwhile, 2,549 patients have fully recovered, and the death toll remains at 35.

After locally-infected cases were detected in late April, localities around the country are tightening epidemic prevention measures.