Dammit! So, my mind came back to Ion Spinal Mounts while browsing material about the Collapse. These could be the ultimate in anti-viral weaponry. Now I just need to figure out how to scale them up to be able to affect something planet-sized. Perhaps a fleet of ships all targeting the planetary surface at once to cleanse a world of the Virus. Something strong enough to affect electronics that are turned off, powered down, or shielded from normal ion weapons.