Sterilizing immunity against hepatitis C virus is subtype specific, is apparently not mediated by neutralizing antibodies, but is correlated with anamnestic cellular immune responses: Jens Bukh, National Institutes of Health, Bethesda, MD; Robert Thimme, Scripps Research Inst, La Jolla, CA; William Satterfield, Univ of Texas M D Anderson Cancer Ctr, Bastrop, TX; Xavier Forns, National Institutes of Health, Bethesda, MD; Kyong-Mi Chang, Scripps Research Inst, La Jolla, CA; Masayuki Yanagi, Suzanne U Emerson, National Institutes of Health, Bethesda, MD; Francis V Chisari, Scripps Research Inst, La Jolla, CA; Robert H Purcell, National Institutes of Health, Bethesda, MD