Delivery of mRNA Vaccine against SARS-CoV-2 Using a Polyglucin:Spermidine Conjugate. - Karpenko LI; Rudometov AP; Sharabrin SV; Shcherbakov DN; Borgoyakova MB; Bazhan SI; Volosnikova EA; Rudometova NB; Orlova LA; Pyshnaya IA; Zaitsev BN; Volkova NV; et al. (Vaccines, 2021)