Dr Sophon Iamsirithaworn from the Department of Disease Control said on Wednesday that a total six cases were detected among those who sneaked into Thailand from Myanmar via Chiang Rai’s Mae Sai district.
Among the infected cases is a woman aged 25, who took a flight from Don Mueang Airport in Bangkok to Phitsanulok Airport and was later found infected in Phichit province.
Provincial Governor Ronnachai Chitwiset said the flight she took was AirAsia FD3306. This 5.15pm flight on November 28 had 120 passengers and a crew of nine.
According to a report, 20 passengers are said to be at high risk – four live in Phitsanulok while the remaining 16 are from other provinces. Health officials said the other 100 passengers were treated as low-risk cases.
Ronnachai said the high-risk cases in Phitsanulok are under close watch. Authorities have also contacted all low-risk persons.
The province has urged people to make sure they protect themselves from Covid-19 after the infected case was confirmed.
The provincial airport was sterilised on Wednesday.