Among 17 fresh community cases, Hanoi recorded 4 cases, all having close contact with COVID-19 patients related to COVID-19 hotspot in Hai Duong.
Quang Ninh province registered 3 patients related to the outbreak of Chi Linh city, Hai Duong province.
Binh Duong province recorded 1 patient, the first infection in Binh Duong linked to Hai Duong epidemic cluster.
Hai Duong province recorded 9 cases, including 5 found in the blockade area and 4 related to Chi Linh city hotbed. Thus far, Hai Duong has recorded 188 cases.
The remaining 19 imported cases came from Germany, China, France and the US and were quarantined immediately upon entry.
The same day, one coronavirus patient was released from hospital after making a full recovery from the virus, bringing the total recoveries to 1,457.
As of 6 p.m on January 31, Vietnam registered a total of 931 cases of local transmission, of which the number of new locally- infected cases since January 27 rose to 238.
Among patients receiving treatment in hospitals, nine have tested negative for SARS-CoV-2 once, four twice and three thrice.
A total of 23,065 people who had close contact with COVID-19 patients or returned from pandemic-hit areas are under health observation throughout the nation.
During the course from January 28 to 31, the coronavirus has spread to 9 provinces and cities, including Hai Duong (188), Quang Ninh (25), Hanoi (13), Gia Lai (4), Bac Ninh (3), Hoa Binh (2), Ho Chi Minh City, Hai Phong, and Binh Duong (1), each.
Particularly, January 31 saw the detection of 31 community cases, while 61 cases were confirmed one day earlier.
Meanwhile, bars and disco and karaoke venues operating in the capital city of Hanoi will be temporarily suspended as from zero hour February 1 until further notice in an effort to slow the rapid spread of the novel coronavirus to the wider community.
In another development, a new variant of SARS-CoV-2 virus on a COVID-19 patient entering Vietnam from South Africa was found by scientists from the National Institute of Hygiene And Epidemiology.
The patient has been placed into quarantine right upon entry and is undergoing treatment at the National Hospital of Tropical Diseases.
The new variant, recorded in South Africa, has a higher speed of spreading than those detected from the first outbreak of the pandemic.
Vietnam has so far confirmed two SARS-CoV-2 variants stemming from the UK and South Africa.