1. Chakraborty I, Maity P. COVID-19 outbreak: Migration, effects on society, global environment and prevention. Sci Total Environ. 2020;728:138882.
2. World Health Organization. WHO Coronavirus (COVID-19) Dashboard [Internet]. Available from: https://covid19.who.int. Accessed 11 Feb 2022.
3. The Prime Minister of Vietnam. Directive No.358/CT-CHK - Prevention of acute respiratory infections caused by new strains of Corona virus to aviation activities in Vietnam, 2020.
4. Ministry of Health, Vietnam. Information Page of Ministry of Health on COVID-19 pandemic [Internet]. 2022. Available from: https://ncov.moh.gov.vn/.
5. Ridgway JP, Schmitt J, Friedman E, Taylor M, Devlin S, McNulty M, et al. HIV care continuum and COVID-19 outcomes among people living with HIV during the COVID-19 Pandemic, Chicago IL. AIDS Behav. 2020;7:1–3.