Vietnam confirmed four more COVID-19 cases, including one American, in the community on Wednesday night, bringing the day’s count to 12.

The U.S. man, 57, was diagnosed in Ho Chi Minh City on Tuesday after traveling from Da Nang, Vietnam’s coronavirus epicenter at this time, according to the National Steering Committee for COVID-19 Prevention and Control.

He lives in Hoa Khanh Bac, Lien Chieu, DA Nang. He developed a fever, coughed, and found it difficult to breathe on June 26 so he was admitted to Hoan My Da Nang Hospital.

From July 6 to 20, he was transferred to Da Nang Hospital and was treated there.

He was taken to Cho Ray Hospital in Ho Chi Minh City on July 20 before being admitted to City International Hospital in the same city on July 21.

The patient tested positive for COVID-19 on Tuesday, with sample having been sent to the Ho Chi Minh City Hospital for Tropical Diseases for testing one day earlier.

A Vietnamese woman who took care of him in the whole process also had her test come back positive on Tuesday.

The other two patients were detected in Hanoi and the Central Highlands province of Dak Lak. Both had come back from their trips to Da Nang, a touristy city on the central coast.

Vietnam had announced eight community-based coronavirus cases on Wednesday morning, all linked to four hospitals in the coastal city.

Vietnam has recorded 34 community-based cases, all traced back to Da Nang, since Saturday last week, after having gone 99 days without a single local transmission, according to a Tuoi Tre News count.

Twenty-six of the patients are in Da Nang, three in Quang Nam, one in Quang Ngai Province, one in Hanoi, two in Ho Chi Minh City, and one in Dak Lak.

Authorities are conducting aggressive contact tracing to stall the virus.

The Southeast Asian nation has confirmed 450 COVID-19 infections as of Wednesday night, with 369 recoveries and zero casualties.

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