The NB.1.8.1 strain has become the main Covid-19 variant in Thailand over the past year. However, health officials have stated there is no indication that it spreads more quickly or causes more severe illness.
Dr Montien Kanasawat, director-general of the Department of Disease Control (DDC), noted a slight increase in Covid-19 cases compared to the previous week. No clusters or new deaths have been reported.
Authorities have urged the public to continue basic precautions, especially to protect young children, the elderly, and those with health conditions. People in crowded areas are advised to wear masks and wash hands frequently. Those with symptoms should seek medical care.
The DDC reported a total of 3,642 cases of Covid-19 and one death this year as of 23 May.
Most cases occurred in individuals aged 30–35, followed by those over 60 and people aged 20–29. Despite the recent rise, case numbers are still below the five-year median.
Data from the Public Health Research Institute, covering 1 January 2025 to 23 April 2026, showed NB.1.8.1 was present in 50.95% of samples. This was followed by JN.1 at 24.97% and XEC at 9.14%.
Deputy director-general Dr Direk Khampaen stated that Covid-19 is now considered an endemic or seasonal disease in Thailand. However, he emphasised the importance of maintaining good hygiene and preventive measures.
