- On March 22, 2019, Thai health authorities reported a measles outbreak among 16 workers in two factories, leading to an investigation which found a total of 56 cases with a notably higher infection rate among migrant workers compared to Thai workers.
- Testing confirmed that 38% of blood samples were positive for measles, and environmental assessments identified a crowded living situation and shared drinking glasses as key factors in the outbreak's spread.
- To control the outbreak, vaccinations were given to affected employees, and recommendations were made to include a vaccination program in the work permit process for migrant workers in the future.