1. https://ourworldindata.org/polio Accessed March 11 2021.
2. BeckerB.Sister Elizabeth Kenny and Polio in America: Doyenne or Demagogue in Her Role in Rehabilitation Medicine? PM R 2018;10:208‐217.https://doi.org/10.1016/j.pmrj.2017.11.012 Accessed March 11 2021.
3. https://www.nationalgeographic.co.uk/science‐and‐technology/2020/04/experts‐warned‐of‐pandemic‐decades‐ago‐why‐werent‐we‐ready Accessed March 11 2021.
4. https://www.forbes.com/sites/kerryadolan/2020/06/24/how‐the‐billionaire‐behind‐the‐movie‐contagion‐is‐working‐to‐stop‐this‐pandemic‐and‐the‐next‐one/?sh=2dd319b05e18 Accessed March 11 2021.
5. https://www.who.int/director‐general/speeches/detail/who‐director‐general‐s‐opening‐remarks‐at‐the‐media‐briefing‐on‐covid‐19‐11‐march‐2020 Accessed March 11 2021.