Hasten a Disease Effect?

[Warhaven]

Anyone know off the top of their head if there's a spell or class ability that can hasten the effects of a disease already in place? Sort of like contagion, but only make a pre-existing condition immediately affect the person.

[Flintas]

As in hasten the onset time or make the effects more frequent?

[Warhaven]

Flintas wrote:

As in hasten the onset time or make the effects more frequent?

Onset time, so it'll apply its effects right away like with the contagion spell.