Prevalence and Outcomes of SARS-CoV-2 Infection Among Migrant Workers in Singapore

High-density communal residences are at elevated risk of large outbreaks of respiratory disease.1,2 After an initial nationwide outbreak of 231 cases of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections in Singapore, which was contained as of March 24, 2020, a surge of 244 cases among migrant workers residing in dormitories, largely from Bangladesh and India, occurred from March 25 to April 7.A national task force was formed to coordinate Singapore's outbreak response.A national lockdown from April 7 to June 1 enforced movement restriction and confined workers to their dormitories.Medical posts were deployed on-site in all dormitories, and testing capacity for testing and screening residents increased.All workers with a positive polymerase chain reaction (PCR) test result were admitted to health care facilities for isolation and treatment.We examined the prevalence and outcomes of SARS-CoV-2 infection among migrant workers in Singapore.