The infected persons, three Thais and three foreigners, were all asymptomatic.
Among them is a 45-year-old Thai welder in state quarantine in Bangkok, who returned from Uzbekistan on August 13 and tested positive on Monday and 36-year-old Thai woman who returned from the Philippines on August 15, and tested positive in the Chonburi state quarantine on Thursday.
A 44-year-old Thai woman and a 62-year-old American man who holds a Thai work permit travelled in the same flight from Germany on August 22. The American man, staying in an alternative state quarantine in Bangkok, and the Thai woman in a state quarantine facility in Samut Prakan were both found positive on Wednesday.
A 36-year-old Ethiopian woman, who is here for medical treatment, and her 34-year-old husband arrived on Wednesday and checked into an alternative hospital quarantine in Bangkok. Both of them checked positive on the same day.
As of Friday, the total number of confirmed cases in Thailand stood at 3,410 (473 found in state quarantine), of whom 115 are in hospital and 3,237 have recovered and discharged. The death toll remains unchanged at 58.
Globally, the total number of confirmed cases rose to 24.6 million (7.6 million active cases), up by 282,000. Of them, 17 million have recovered, while 835,000 have died so far.
Thailand ranks 120th in terms of most cases in the world, while the list is led by the US with 6.04 million infections, followed by Brazil 3.76 million, India 3.38 million, Russia 976,000 and Peru with 622,000.