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Oral subunit SARS-CoV-2 vaccine induces systemic neutralizing IgG, IgA and cellular immune responses and can boost neutralizing antibody responses primed by an injected vaccine.
Pitcovski J, Gruzdev N, Abzach A, Katz C, Ben-Adiva R, Brand-Shwartz M, Yadid I, Ratzon-Ashkenazi E, Emquies K, Israeli H, Haviv H, Rapoport I, Bloch I, Shadmon R, Eitan Z, Eliahu D, Hilel T, Laster M, Kremer-Tal S, Byk-Tennenbaum T, Shahar E. Pitcovski J, et al. Among authors: shadmon r. Vaccine. 2022 Feb 16;40(8):1098-1107. doi: 10.1016/j.vaccine.2022.01.025. Epub 2022 Jan 19. Vaccine. 2022. PMID: 35078662 Free PMC article.