With 78 cases recorded in the morning, the number recorded in the day so far has risen to 109, the highest number since the disease first broke out to Vietnam more than a year ago.

On Sunday, 92 local cases were recorded. The previous record was 84, recorded on January 28 as the third wave broke out in the northern Hai Duong Province.

21 of the new cases were recorded in Hanoi, seven in Bac Giang, one each in Hoa Binh, Da Nang and Hai Duong.

In Hanoi, 12 cases were recorded at the locked down National Hospital for Tropical Diseases, a major coronavirus hotspot. Among them were a medical worker, eight patients and three of their family members. Three other patients, two men and a woman aged 35-72, were associated with public cancer facility K Hospital, which is also under lockdown. Two others, both male aged 1 and 56, have been in contact with confirmed coronavirus cases.

All the cases in Hanoi are being treated at the National Hospital for Tropical Diseases.

In Bac Giang, one man and six women aged 19-47, were all those who have made contact with confirmed coronavirus cases. They are all treated at the Bac Giang Province general hospital.

In Hoa Binh, a 33-year-old man was infected after being associated with the K Hospital. He's being treated at the Hoa Binh Province general hospital.

A 35-year-old man in Da Nang and a 25-year-old man in Hai Duong were infected after making contact with other coronavirus cases.

A 35-year-old Pakistani expert is an imported case who flew from the UAE to HCMC on May 8. He's being treated at the Long Dien District medical center in the southern Ba Ria-Vung Tau Province.

Nationwide, 442 community transmission cases in 26 cities and provinces have been recorded since late last month as Vietnam experiences one of its most challenging Covid-19 waves yet.