The Department of Disease Control (DDC) forecasts that Covid-19 infections will decline significantly from the middle of this year.
Daily infections should reach a low of 200 cases a day by August, according to the chief of the department.
Speaking at a press conference on Friday, Dr Opas Karnkawinpong, DDC director-general, said the department predicted the Covid-19 situation will improve greatly if no new variants emerge.
"Although infection cases in Thailand are going up now, they will decline according to epidemiological principles," he said.
The department's model projects the number of daily infections will hit 4,000 in June, 1,000 in July and 200 in August, according to Dr Opas.
As of yesterday, the number of daily infections surged to 9,909 with 22 deaths, prompting the department to ask the public to cooperate in tightening preventive measures.
Opas: Current measures sufficient
Dr Opas said there are many factors behind the increase, especially relaxed measures for eateries and a growing number of small clusters countrywide, so preventive measures are still needed.
"Please do not worry about the figure. It is not important as long as our public health system can effectively manage the outbreak," he said.
"The most important point is that we have large-scale vaccination, especially of booster doses now having reached 21.4% [of the population]," he added.
He said current measures are sufficient to control the situation, adding that many countries with high daily infection rates have not imposed any extra restrictions to control the disease.
Dr Opas also warned the public to be cautious of other diseases that might afflict higher numbers of people this year.
The department has predicted that the number of avian influenza patients will more than double to around 22,800 this year, up from 10,698 in 2021.
Meanwhile, it forecast that the number of dengue fever sufferers will soar to 85,000, up from 9,956 cases last year, with the peak coming in July with about 13,800 cases.