A healthcare worker is one of 18 more coronavirus cases confirmed by the Ho Chi Minh City Centre for Diseases Control (HCDC) on June 3 morning.
A house in Go Vap district has been cordoned off on June 2 evening for field investigations after a local tested positive for the virus.
The patient works at South Saigon Hospital, said HCDC, adding that the source of infection is unknown.
The remaining 17 cases are linked to the coronavirus outbreak at the Revival Ekklesia Mission Vietnam, a Christian congregation in Go Vap district.
They have tested positive after having close contact with COVID-19 patients.
HCM City has so far recorded 265 cases tied to this religious sect since the first such case was detected on May 26.