Vaccines; Oral vaccines; Modified cells for medical or clinical use; Pharmaceuticals in the nature of yeast-based pharmaceuticals; Oral vaccine preparations; Pharmaceutical products for the treatment of infectious diseases; Recombinant yeast-based pharmaceutical products; Yeast-based oral vaccines; Pharmaceutical preparations, namely, a drug delivery system comprising yeast-based oral vaccines; Pharmaceutical products, namely, yeast-based oral vaccines; Biological and pharmaceutical preparati...