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[62, 66, 107, 116, 181], 'X31': [63, 196, 225], 'each': [64, 174, 182], 'differ': [65], 'virus': [69, 109, 184, 271], 'by': [70], 'one': [71], 'amino': [72], 'acid:': [73], 'an': [74, 85, 232], 'M371V': [75], 'substitution': [76, 87], 'at': [77, 88], 'position': [78, 89], '6': [79], 'NP': [82, 175, 217], 'peptide,': [83, 94], 'S224P': [86], '1': [90], 'PA': [93, 219], 'raising': [95], 'questions': [96], 'about': [97], 'role': [99], 'these': [101, 124], 'protection.': [104], 'peptides': [106, 156, 220, 244], 'either': [108, 133, 162], 'could': [110], 'elicit': [111], 'IFN-γ': [112, 201], 'spot': [113], 'forming': [114], 'cells': [115, 180, 238], 'infected': [118], 'X31,': [120], 'indicating': [121], 'cross-reactivity': [122, 260], 'two': [125], 'peptides.': [126], 'However,': [127], 'no': [128], 'responses': [131, 152, 202, 211], 'peptide': [135], 'were': [136, 157], 'detectable': [137, 158, 222], 'after': [138, 159, 192, 223, 248, 265], 'primary': [139, 151, 224, 266], 'infection,': [141, 185], 'suggesting': [142], 'it': [143], 'is': [144], 'cryptic': [145], 'this': [147], 'In': [149], 'contrast,': [150], 'NP366': [155, 205, 242], 'but': [164, 186], 'did': [165, 187], 'not': [166, 188, 221, 246], 'cross-react': [167], 'vitro.': [169], 'Similarly,': [170], 'H2-Db': [171], 'tetramers': [172], 'epitope': [176], 'stained': [177], 'CD8+': [178, 257], 'respective': [183], 'obviously': [189], 'cross-react.': [190], 'Early': [191], 'challenge,': [195], 'had': [199], 'enhanced': [200], 'toward': [203], 'both': [204, 241], 'peptides,': [206], 'as': [207, 209], 'well': [208], 'recall': [210], 'subdominant': [216], 'alone.': [227, 252], 'Furthermore,': [228], 'dual-tetramer': [229], 'staining': [230], 'revealed': [231], 'expanded': [233], 'population': [234], 'reactive': [239], 'variant': [243], 'also': [245], 'seen': [247], 'priming': [250], 'These': [253], 'observations': [254], 'demonstrate': [255], 'unusual': [256], 'specificity': [262], 'elicited': [264], 'secondary': 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