1. World Health Organization. The COVID-19 candidate vaccine landscape, https://www.who.int/publications/m/item/draft-landscape-of-covid-19-candidate-vaccines, 2020. Updated December 22, 2020. Accessed December 28, 2020.
2. US Food and Drug Administration. Pfizer-BioNTech COVID-19 Vaccine, https://www.fda.gov/emergency-preparedness-and-response/coronavirus-disease-2019-covid-19/pfizer-biontech-covid-19-vaccine, 2020. Updated December 23, 2020. Accessed December 28, 2020.
3. US Food and Drug Administration. Moderna COVID-19 Vaccine, https://www.fda.gov/emergency-preparedness-and-response/coronavirus-disease-2019-covid-19/moderna-covid-19-vaccine, 2020. Updated December 21, 2020. Accessed December 28, 2020.
4. US Food and Drug Administration. Janssen COVID-19 Vaccine, https://www.fda.gov/emergency-preparedness-and-response/coronavirus-disease-2019-covid-19/pfizer-biontech-covid-19-vaccine, 2021. Updated May 5 2021. Accessed May 17 2021.
5. Framework for equitable allocation of COVID-19 vaccine;Gayle,2020