27 December 2021. The number of patients infected with the Omicron strain in Thailand has risen to 514, with two-thirds of them being tourists. The newest cluster of concern was found in Si Sa Ket, where a couple travelling back from Belgium and are believed to have transmitted the virus to 125 people with another 97 awaiting confirmation. The cluster is also believed to be linked to six infections in Udon Thani and four in Lamphun. https://www.nationthailand.com/in-focus/40010482