1. Centers for Disease Control (2020). COVID-19 and Your Health. Retrieved from https://www.cdc.gov/coronavirus/2019-ncov/travelers/how-level-is-determined.html. [Accessed 15 December 2021].
2. U.S. Food & Drug Administration. (2021). Retrieved from https://bdveritor.bd.com/content/dam/bdveritor/pdfs/EUA201889-BD-Veritor-Ag-Letter-of-Authorization-07152020-Corrected.pdf. [Accessed 15 December 2021].
3. Utilisation of SARS-CoV-2 rapid antigen assays in screening asymptomatic hospital visitors: mitigating the risk in low-incidence settings;Wee;Int J Infect Dis,2021
4. World Health Organization (2021, June). Considerations for implementing and adjusting public health and social measures in the context of COVID-19. Retrieved from https://apps.who.int/iris/rest/bitstreams/1351572/retrieve. [Accessed 15 December 2021].