The patients, 2312 to 2329, are in quarantine.
Since January 28, Vietnam has recorded 737 new Covid-19 community transmissions in 13 localities. Hai Duong leads the tally with 557, followed by Quang Ninh (60), Ho Chi Minh City (36) and Hanoi (35).
The national Covid-19 total stands at 2,329, with 1580 recoveries and 35 deaths. Seven of the recoveries were confirmed Wednesday.
Among the active patients, 104 have tested negative at least once for the novel coronavirus.
Over 145,000 people are in quarantine, 15,000 in centralized quarantine facilities, over 500 in hospitals and the rest at home or other designated accommodations.
Covid-19 has claimed 2.4 million lives globally.