HANOI -- Vietnam is close to completing the conversion of a sports stadium into a 1,000-bed field hospital in its new coronavirus epicentre Da Nang, the health ministry said on Thursday, as it battles an outbreak that has spread to at least 11 locations.

Aggressive contact-tracing, targeted testing and strict quarantining had helped Vietnam halt an earlier contagion, but it is now racing to control infections in the central city and beyond after a new outbreak ended a run of more than three months without domestic transmission.

Da Nang’s Tien Son Sports Palace will from Saturday be used to treat an overflow of infected patients should the city’s hospitals become overwhelmed, said the company behind the project, Sun Group.

A total of 269 local infections have been traced to Da Nang since the virus reappeared there on July 25. Authorities have said the situation was “under control” and the outbreak would likely peak in the next 10 days.

If infection numbers stabilise, the facility would be used to isolate people who were in direct contact with a positive case, as part of Vietnam’s centralised quarantine programme, Sun Group said.

The health ministry reported five new COVID-19 infections on Thursday, taking Vietnam’s total cases to 718, with 10 deaths.

Most recent cases have links to three hospitals in Da Nang, a coastal city that was until recently inundated with domestic tourists capitalising on holiday promotions and easing restrictions.

The health ministry has sent a task force of medical experts and more than 1,000 health workers to Da Nang, while Cuba has also dispatched a medical team to Vietnam to assist.

In the capital Hanoi, 72,000 people who recently returned from Da Nang would be re-tested, the city’s governing body said on Thursday, this time using a swab-based test, known for its higher rate of accuracy than the blood sample-based rapid test kits, which Vietnam has used for mass screening.

Vietnam’s Prime Minister has said early August was the “decisive” time to contain the outbreak.