WT1 and cancer: We also developed an oral vaccine platform using LAB, Bifidobacterium longum (B. longum), and constructed a variety of oral vaccines, including a recombinant B. longum displaying Salmonella flagellin protein as a typhoid vaccine,17 a recombinant B. longum displaying hepatitis C virus (HCV) nonstructural protein 3 (NS3) as an HCV vaccine,18 and a recombinant B. longum displaying Wilms’ tumor 1 (WT1) protein as a cancer vaccine.19