Prime Minister Prayut Chan-o-cha hopes the Covid-19 situation in the country will ease in the next four to six weeks, a source said.

"I hope the situation will improve in the next four to six weeks based on the current medical evidence," the source quoted Prayut saying during an online meeting as the infection rate set another daily record on Wednesday.

"But I am concerned about the public use of antigen test kits. I am not sure whether they know how to use them properly," Prayut reportedly said.

Prayut chaired an online meeting attended by governors of 12 "dark-red zone" provinces -- Pathum Thani, Chon Buri, Nonthaburi, Nakhon Pathom, Samut Sakhon, Ayutthaya, Chanchoengsao, Samut Prakan, Pattani, Narathiwat, Yala, and Songkha.

Prayut wanted to better understand how each governor was managing the Covid-19 situation.

The prime minister told the governors to update the government on their problems so the government could fix them.

During the meeting, Prayut asked the governors whether the number of daily infections in their provinces had dropped, but none had any reply, the source said.

Prayut told the meeting that the government is not sitting idle.

Prayut insisted the country is not facing a shortage of medical supplies, including medicine and oxygen tanks.

Meanwhile, a doctor said on social media there may be about 400,000-500,000 asymptomatic cases in Bangkok.

Symptomatic cases account for 20% of infections while asymptomatic cases account for up to 80%, he said.