Bangkok led the list with 872 cases, followed by 590 in Nonthaburi, 227 in Phetchaburi and 126 in Samut Prakan.
The capital also led the list of fatalities with 15 dead, followed by two each in Pathum Thani and Samut Prakan, and one each in Nonthaburi, Petchaburi, Nonthaburi, Buri Ram, Amnat Charoen, Kalasin and Nakhon Sawan.
Of the 19 returnees, 17 were Thai nationals – seven from Saudi Arabia, four from Malaysia, two each from India and Cambodia, and one each from Indonesia and the US. Other infected arrivals were an Indian from India and a South African from Egypt.
Meanwhile, 3,094 patients have recovered and been discharged in the last 24 hours.
As of Tuesday, the number of confirmed cases in Thailand had risen to 135,439. So far, 89,194 people have recovered and been discharged, 45,413 patients are still in hospitals and 832 have died.
Meanwhile, another 102,558 people were given their first Covid-19 shot in the last 24 hours, while 11,091 people were given their second shot, bringing the total number of Covid-19 vaccine doses administered in Thailand to 3,024,313.
According to Worldometer, as of 11am on Tuesday, the number of confirmed cases globally had risen to 167.98 million (up by 442,798), 149.3 million of whom have recovered, 15.2 million are active cases (97,620 in severe condition) and 3.48 million have died (up by 8,865).
Thailand ranks 86th on the global list of most cases, which is topped by the US with 33.92 million, followed by India 26.94 million, Brazil 16.12 million, France 5.6 million and Turkey 5.19 million.