1. United States Centers for Disease Control and Prevention. About COVID-19. https://www.cdc.gov/coronavirus/2019-ncov/cdcresponse/about-COVID-19.html, Accessed 6 Nov. 2020; 2020.
2. Natural history of COVID-19 and current knowledge on treatment therapeutic options;Santos;Biomed Pharmacother,2020
3. World Health Organization. WHO coronavirus disease (COVID-19) dashboard. https://covid19.who.int/; 2020. Accessed 8 Dec. 2020.
4. mRNA vaccines-a new era in vaccinology;Pardi;Nat Rev Drug Discov,2018
5. New York Times. Coronavirus vaccine tracker. https://www.nytimes.com/interactive/2020/science/coronavirus-vaccine-tracker.html?auth=login-email&login=email, Accessed 6 Nov. 2020; 2020.