Most notably, the latest cases had links to hospitals in Da Nang, with many being patients, care takers and those who came into close contact with the infected people.
Vietnam has so far confirmed 558 infections, 302 of them are imported cases and 116 others related to Da Nang city since July 25.
Earlier on July 31, the nation reported two COVID-19-related deaths, including a 70-year-old man and a 61-year-old man and they both had multiple comorbidities and were linked to Da Nang hotspot.
During the past week, from Da Nang epidemic center, COVID-19 has spread to 6 provinces and cities nationwide, with 116 cases of local transmission being reported.
More than 91,462 people who had close contact with COVID-19 patients or returning from pandemic-hit areas are in quarantine across the nation, including 953 at hospitals and the remainder at concentrated facilities and their home.
Among the remaining cases in treatment, 14 cases have tested negative for the SARS-CoV-2 virus one or at least twice.
Amid the rapid and complicated developments of the pandemic, Hanoi authorities ordered a shutdown of all bars, karaoke venues and roadside stalls and announced a ban of large gathering, staring from August 1 as the country has seen the outbreak of the COVID-19 in many localities in recent days.
During a meeting of the National Steering Committee for COVID- 19 Prevention and Control in Hanoi on July 31, Deputy Prime Minister Vu Duc Dam urged authorizes to make all-out efforts to soon stamp out the COVID-19 hotbed in Da Nang, noting that with new cases being mostly related to hospitals in the city, localities, especially major cities, to intensify countermeasures to slow the spread of the virus to other localities.