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The Adaptive Virus's most unique feature is that after taking elemental damage, it will morph into a version resistant to that elemental type. For instance, it might become a Corrosive-Adapted Virus. The effect does wear off over time, but it will necessitate weapon swapping in order to maintain combat effectiveness, if using elemental weapons. Using barrels or Volatile Bits can be an effective way to force Viruses to adopt desired adaptations.
Adaptive Viruses attack with either melee or ranged attacks, the ranged attacks lobbing projectiles at the Vault Hunters.