Clinical resistance Analysis of patients with virological rebound (confirmed increase of ≥ 1 log10 copies/ ml HBV DNA from nadir) in the pivotal study (NV-02B-007) at week 48 indicated that, among HBeAg-positive and HBeAg-negative patients, 5% (23/ 458) and 2% (5/ 222), of telbivudine recipients, respectively, had virological rebound with detectable HBV resistance mutations.