Thailand has logged 187 new cases of the novel coronavirus, bringing the total number of confirmed cases since the start of the pandemic a year ago to 13,687.
Two additional deaths were reported, raising the accumulated toll to 75.
The 187 new cases comprised 116 found through active searching, 61 local transmissions found in hospitals and clinics, and 10 people who recently entered the country from abroad.
Deputy Centre for Covid-19 Situation Administration (CCSA) spokeswoman Apisamai Srisangson told The Bangkok Post that one of the two new deaths was of a British man, 61, who arrived in Bangkok on Dec 25 and tested positive on Dec 29.
His condition had gone downhill since then, but he refused to use a respirator until his death on Sunday.
The other fatality was a Thai woman, 56, who died on Thursday in Samut Sakhon.
Although she had mostly stayed at home, her husband worked with people transporting fish in the province. Doctors suspected she had Covid-19 and after her death on Sunday a test confirmed it.
Thirty-five of the 187 new cases reported by the centre on Monday appeared in Samut Sakhom, followed by 20 cases in Bangkok, three in Samut Songkhram, two in Samut Prakan and one in Rayong.
Samut Sakhon is the main target for health personnel conducting comprehensive active testing in factories, dormitories and markets this week. As many as 10,000 people are expected to be tested each day.