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Several chemicals, including occupational carcinogens (OCs), have been used in Thailand. Apart from asbestos and silica, other OCs need to be identified for further monitoring and management. The study aimed to identify and conduct priority setting of these carcinogens in Thailand. The methods of the study were applied from Hanlon’s method for priority setting. The first step was to identify OCs from the lists of the National Hazardous Substance Registry by using the criteria as follows: 1) being classified as OCs by Loomis et al., and 2) having high amount of import/export in the country during 2018–2020. After that, the identified agents were ranked according to three criteria: 1) size of the problem, 2) severity of the problem, and 3) feasibility of interventions. The results found that 18 occupational carcinogens were identified and 12 of them were still allowed to be used in the country. According to available information, seven agents were matched for priority setting, and the top three scored OCs included 1) arsenic and inorganic arsenic compounds, 2) trichloroethylene, and 3) formaldehyde. Further action plan includes health risk assessment, setting up of health surveillance, and implementation of preventive and control measures in the target workplaces.

COVID-19 outbreaks in business establishments cause a stagnant economy. In Thailand, the COVID-19 situation in business establishments has never been investigated. This study aims to (1) describe the situation and (2) compare characteristics, including spatial patterns, of COVID-19 cases in business establishments between the Delta (July–December 2021) and Omicron (January–May 2022) predominant periods. A cross-sectional study was conducted using secondary data extracted from the Department of Disease Control’s database, which was linked to listed company and factory databases. The study population included all reported COVID-19 cases. The proportions of case characteristics between the delta and omicron dominant periods were compared using Pearson’s Chi-square test. Spatial autocorrelation was tested using Moran’s I statistics. During July 2021–May 2022, 443,448 COVID-19 cases were reported in business establishments. The proportions of cases in factories and construction camps decreased from 41.3% and 6.7% in the Delta dominant period to 14.4% and 1.7% in the Omicron dominant period, respectively. A high number of cases occurred in businesses operating food production, wholesale/retail, transportation, and accommodation. Clustering patterns were evident in the central and eastern regions of Thailand where many business establishments are located. Public health agencies should promote organizational COVID-19 prevention measures and increase worker’s awareness in high-risk industries.