Wang S, Cui H, Zhang C, Li W, et al. Oral delivery of a chitosan adjuvanted COVID-19 vaccine provides long-lasting and
broad-spectrum protection against SARS-CoV-2 variants of concern in golden
hamsters. Antiviral Res 2023 Nov 28:105765. doi: 10.1016/j.antiviral.2023.105765.
PMID: 38036065