I haven't tested this build, it's just something I theorized could work well.

You ever wonder why Vasca kavats don't do innate viral damage on their attacks, when they spread the virus to non-infected kavats through bites? Well wonder no longer, I've got you covered.

This build requires 7 Forma, and includes Maul and Bite for damage, Fetch and Primed Animal Instinct for utility, Transfusion for the free revive, and Link Armor/Shields/Health for survivability.

The dual stat mods can be changed to suit your needs, but I think that Viral/Corrosive would be the best combination.

If you are playing a frame without any shields (like [Nidus] or [Inaros]), you could replace Link Shields with something else for more damage, like [Swipe].