
The Centre for Covid-19 Situation Administration reported 21 new cases in state quarantine facilities over a 24-hour period on Monday.
The cases include nine Thais aged between 21 and 44 who returned from Tachilek city in Myanmar on December 4 and tested positive for Covid-19 on the same day. They were immediately sent to Chiang Rai Prachanukroh Hospital for isolation and treatment.