There are 15 confirmed cases of the COVID-19 virus in Vietnam, five of them in Son Loi commune.
Previous diagnostic methods were restricted to nucleic acid tests, which identify genetic information to detect viruses but can take days to process.
The provincial health commission said last week that it would begin recognizing computerized tomography (CT) scan results as confirmation of infections, allowing hospitals to isolate patients more quickly.
As the coronavirus outbreak has dragged down business activities in China, President Xi Jinping's government pledged at a meeting on Wednesday that it will make efforts to shore up the world's second-largest economy while taking measures to contain the virus' spread. The World Health Organization held a gathering in Geneva on Tuesday to offer speedy screening, medicines and vaccines, and to forestall the unfold of the an infection which has already reached 20 worldwide locations.
Dr. Mike Ryan, the head of emergencies for the World Health Organization, said it is "way too early to try to predict the beginning of the end" of the crisis in China.
Nearly 34,000 patients have been hospitalized across Hubei, the central Chinese province of which Wuhan is capital, including 1,400 or so in a critical condition.
"I'd be pretty confident though that eventually every country will have a case".
Earlier this month, the Communist Party Committee in Hubei announced the dismissal of the province's two top health authority officials.
Two of Hubei's senior health officials were also removed Monday.
The outbreak is suspected to have originated in the Hubei provincial capital of Wuhan in December.
The biggest cluster of cases outside China is on a cruise ship quarantined off the Japanese port of Yokohama, where a further 44 cases were reported on Thursday.
Holland American Line, the cruise operator, said it would charter flights to transfer some 2,000 passengers out of the coastal city of Sihanoukville.
Although no passengers have fallen ill on board, the ship had been turned away by Japan, Taiwan, Guam, the Philippines and Thailand over fears that someone on the cruise could have the virus.
The surge brings the total number of deaths in the province to 1,310.