Twenty one cases in Bac Giang Province, the current epicenter of the country's fourth coronavirus wave, and eight in its neighbor Bac Ninh, are linked to clusters at its industrial parks and had been quarantined prior to testing.

All 10 new cases in HCMC are linked to a cluster that emerged on May 26 at a Christian congregation called Revival Ekklesia Mission based in Go Vap District, which has been placed under a lockdown since May 31. Infections were first detected among its members before the virus spread to 21 of the city's 22 districts, and then to other provinces in the south and Central Highlands.

Since April 27, when the new wave began in Vietnam, 5,460 infections have been recorded in 39 of the nation's 63 cities and provinces, including major cities, industrial hubs and localities housing foreign tech giants.

So far, over 1.2 million people have been vaccinated against Covid-19, mainly frontline workers in the Covid-19 fight, including medics at local hospitals. Of these, more than 33,000 have received the prescribed two doses.