Immune response induced in rodents by anti-CoVid19 plasmid DNA vaccine via pyro-drive jet injector inoculation. Tomoyuki Nishikawa, Chin Yang Chang, Jiayu A Tai, Hiroki Hayashi, Jiao Sun, Shiho Torii, Chikako Ono, Yoshiharu Matsuura , Ryoko Ide, Junichi Mineno, Miwa Sasai, Masahiro Yamamoto, Hironori Nakagami, Kunihiko Yamashita. Immunol Med. 2022 Dec;45(4):251-264.doi: 10.1080/25785826.2022.2111905. Epub 2022 Aug 24.