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.
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.