Dennis Prager. Available from < https://en.wikipedia.org/wiki/Dennis_Prager >. access on 13 November 2021.

Gallagher, James. Covid-resistant people inspire new vaccine tactic: Understanding how some people naturally resist Covid infection, despite clearly being exposed to the virus, could lead to better vaccines, say researchers. Health and science, 11 November 2021. Available from < https://www.bbc.com/news/health-59207466 >. access on 13 November 2021.

Prager, Dennis. Natural Immunity Versus Vaccine Immunity, November 09, 2021. Available from < https://www.realclearpolitics.com/articles/2021/11/09/natural_immunity_versus_vaccine_immunity_146709.html >. access on 13 November 2021.

-- GregorioIvanoff - 13 Nov 2021
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