https://web.archive.org/web/20210210033730/https://scivisionpub.com/pdfs/covid19-rna-based-vaccines-and-the-risk-of-prion-disease-1503.pdf COVID-19 RNA Based Vaccines and the Risk of Prion Disease Classen Immunotherapies, Inc., 3637 Rockdale Road, Manchester, MD 21102, E-mail: classen@vaccines.net. J. Bart Classen, MD* ABSTRACT Development of new vaccine technology has been plagued with problems in the past. The current RNA based SARSCoV-2 vaccines were approved in the US using an emergency orde

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