Thai Health Minister Sukhum Kanchanapimai told the local press that sharing drinks, cigarettes and not avoiding social activities after returning from an at-risk country was an inappropriate behaviour.
One of those had earlier been in contact with tourists from Hong Kong, he said.
On March 13, Thailand reported five more COVID-19 cases, bringing the total to 75.
Among the cases confirmed positive for SARS-CoV-2 in Thailand, one has died while 35 others have recovered and been discharged from hospital.
