Key concepts for gene therapy. Gene therapy aims to (a) replace the function of a defective gene with a functional one, (b) suppress a pathologic genetic variant, or (c) repair a defective gene directly through genome editing. Anguela, X. M. & High, K. A. Entering the modern era of gene therapy. Annu. Rev. Med.70, 273–288 (2019). Figure 2 Recently I’ve seen a surge in concerns that the COVID-19 vaccines are gene therapy. I am not sure what the source is, and furthermore whether or not COV...