I forhold til vild- type HBV, viste LVDr vira indeholdende rtM204V - og rtL180M- substitutioner inden for den reverse transkriptase 8 gange mindre følsomhed over for entecavir.
Resistance in cell culture: relative to wild-type HBV, LVDr viruses containing rtM204V and rtL180M substitutions within the reverse transcriptase exhibit 8-fold decreased susceptibility to entecavir.