Although vaccine platforms based on messenger RNA (mRNA) are enjoying the limelight in the wake of emergency authorizations of products from Pfizer–BioNTech and Moderna, DNA vaccines are poised to make their own commercial debuts soon. The World Health Organization (WHO) reports that six of the 48 candidate vaccines against SARS-CoV-2 that remain in clinical trials are DNA-based products, as are 14 others in preclinical study (1). I spoke with Hong Jiang (cofounder and chief operating officer of Aegis Life, Inc.)…