1. Holder, J. (2023, February 14). Tracking Coronavirus Vaccinations around the World. The New York Times, 13 February 2023. Available online: https://www.nytimes.com/interactive/2021/world/covid-vaccinations-tracker.html.
2. Thomas, K. (2022, July 10). The Vaccines Will Probably Work. Making Them Fast Will Be the Hard Part. The New York Times, 7 December 2020. Available online: https://www.nytimes.com/2020/11/17/health/coronavirus-vaccine-operation-warp-speed.html.
3. Global Impact of the First Year of COVID-19 Vaccination: A Mathematical Modelling Study;Watson;Lancet Infect. Dis.,2022
4. Mueller, B. (2023, February 12). New Covid Booster Shots Cut Risk of Hospitalization by Half, C.D.C. Reports. The New York Times, 16 December 2022. Available online: https://www.nytimes.com/2022/12/16/health/covid-boosters.html.
5. Mandavilli, A. (2022, July 12). The Delta Variant Is the Symptom of a Bigger Threat: Vaccine Refusal. The New York Times, 25 July 2021. Available online: https://www.nytimes.com/2021/07/25/health/coronavirus-vaccine-refusal.html.