Hey Tenno!

The visuals in the video show that out of the three Antivirus mods I had equipped, none of them we're the single correct mod!

As a player this would mean I should swap out all three mods, and try again with new Antivirus choices. Once I find the correct Antivirus I can continue to use it in subsequent Duet fights until I hit 100% Disinfection.

TLDR: Your Coda will be weak to ONE Antivirus mod - try to find it while you fight Duets, and then keep stabbing them!

Hope that helps<3