- Immunization with surface antigen vaccine alone and after treatment with 1-(2-fluoro-5-methyl-beta-L-arabinofuranosyl)-uracil (L-FMAU) breaks humoral and cell-mediated immune tolerance in chronic woodchuck hepatitis virus infection. Menne, S., Roneker, C.A., Korba, B.E., Gerin, J.L., Tennant, B.C., Cote, P.J. J. Virol. (2002)