A woman visited a bustling seafood market in south-central Vietnam every day for a week before being diagnosed with COVID-19, according to epidemiological investigation.
The 37-year-old woman hails from Dong Hoa Town in the south-central province of Phu Yen, the provincial Center for Disease Control confirmed.
Every day from June 18 to 24, the woman traveled on a refrigerator truck from Phu Yen to neighboring Khanh Hoa Province at around 6:30 am to visit Hon Ro, a major wholesale seafood market in the south-central region.
After purchasing fish at the venue, the woman and truck driver returned to Phu Yen at 2:00 pm to resell the products at Tuy Hoa Market in the namesake city.
The woman began showing such symptoms as fatigue and a mild fever on June 25.
On the morning of June 29, she visited the local medical center to fill out a health declaration and have her samples collected for COVID-19 testing.
Her result came back positive for the novel coronavirus on Thursday.
She is being quarantined and treated at the makeshift hospital for COVID-19 treatment in Dong Hoa Town.
Contact tracing has been initiated in Phu Yen as well as at the seafood market in Khanh Hoa.
Vietnam has documented 17,902 COVID-19 cases as of Friday afternoon, with 7,274 recoveries and 81 deaths, according to the Ministry of Health.
The country has recorded 14,505 local infections in 51 provinces and cities, including 131 cases in Phu Yen, since a new outbreak began on April 27.