For reference, the change;

'When the effect of Virus expires, enemies will now be granted the effect Antibody, making them immune to the effects of Virus for 60 seconds.'

Possibility: Antibody is a beneficial effect that can be dispelled.

Result: Keeping Virus on a target requires abit more co-ordination and abilities which dispel effects are actually useful in PvE.

I suspect this probably isn't the case and Antibody is probably gonna be undispellable but one can hope.