The others are 23 in HCMC's neighbor Binh Duong, eight in Bac Giang, four in Hung Yen, two each in Lao Cai and Long An, and one in Bac Kan.

Of the cases in HCMC, 29 had made contact with Covid-19 patients, one linked to a Christian mission cluster, and 10 are being contact traced.

Of the cases in Binh Duong, 20 are associated with outbreaks in two local companies, Vietnam Housewares in Thuan An Town and Binh Duong Water Supply Sewerage Environment Co. Ltd. Three others are close contact cases of confirmed Covid-19 patients.

All the cases in Bac Giang and Bac Kan, both in northern Vietnam, are associated with outbreaks at industrial parks.

All the cases in Long An, Hung Yen and Lao Cai had made contact with coronavirus cases.

The country has recorded a total of 135 cases on Wednesday.

For the past two months, Vietnam's latest Covid wave has seen 10,575 infections recorded in 43 cities and provinces. The most severely hit are Bac Giang with 5,498 cases and HCMC with 2,013.

The nation of 96 million has administered more than 2.5 million Covid vaccine shots by AstraZeneca.