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Degree of telaprevir and boceprevir resistance associated mutations
| Degree of resistance | Mutations | Fold increase |
| Low level | V36A/M/C | 3.5-7 |
| T54A/S | 6-12 | |
| R155K/T/Q | 8.5-11 | |
| Intermediate | V36A/M + R155K/T | 57-71 |
| High level | A156V/T | 74-410 |
| V36A/M + A156V/T | > 700 |
