1. Abdullah, W. J., & Kim, S. (2020). Singapore’s responses to the COVID-19 outbreak: A critical assessment. American Review of Public Administration, 50(6–7), 770–776. https://doi.org/.o0r.g1/107.171/0772/705270570470420020994422454
2. “Active epidemiological investigation on SARS-CoV-2 infection caused by Omicron Variant (Pango Lineage B.1.1.529) in Japan: Preliminary report on infectious period.” National Institute of Infectious Diseases Disease Control and Prevention Center, National Center for Global Health and Medicine, January 5, 2022. https://www.niid.go.jp/niid/en/2019-ncov-e/10884-covid19-66-en.html
3. Al Kuwari, H. M., Abdul Rahim, H. F., Abu-Raddad, L. J., Abou-Samra, A.-B., Al Kanaani, Z., Al Khal, A., Al Kuwari, E., et al. (2020, 28 February–18 April). Epidemiological investigation of the first 5685 cases of SARS-CoV-2 infection in Qatar. BMJ Open, 10(10), e040428. https://doi.org/10.1136/bmjopen-2020-040428
4. Au, B. (2022, March 11). Carrie Lam admits ‘not enough’ done to vaccinate elderly hongkongers from Covid-19. South China Morning Post. https://www.scmp.com/video/coronavirus/3170182/carrie-lam-admits-not-enough-done-vaccinate-elderly-hongkongers-covid-19
5. Baharudin, H. (2021, November 29). Singapore tracking Omicron Covid-19 variant closely, may be forced to take steps back: PM Lee. The Straits Times. https://www.straitstimes.com/singapore/pap-conference-spore-tracking-omicron-covid-19-variant-closely-may-well-be-forced-to-roll