1. Centers for Disease Control and Prevention. Basics of COVID-19 [Available from: https://www.cdc.gov/coronavirus/2019-ncov/your-health/about-covid-19/basics-covid-19.html.
2. Mayo Clinic. COVID-19 Timeline [Available from: https://www.mayoclinic.org/coronavirus-covid-19/history-disease-outbreaks-vaccine-timeline/covid-19.
3. Al Jazeera. Bangladesh starts COVID vaccination drive use 2021 [Available from: https://www.aljazeera.com/news/2021/1/28/bangladesh-starts-covid-vaccination-drive.
4. Anadolu Agency. Bangladesh starts nationwide COVID vaccination drive. 2021.
5. I. S. C. G. (ISCG.). Joint Multi-Sector Needs Assessment - Rohingya Refugee May, 2021 [Available from: https://reliefweb.int/report/bangladesh/joint-multi-sector-needs-assessment-j-msna-bangladesh-rohingya-refugees-may-2021.