Idea for infection
The infection should apply hindered at 50% of the sickness, and fountain should only remove debuffs. Healing is too much, if you really have to give fountain some kind of heal why not apply a 50% heal rate on you. That way you can keep some healing but if you ask me removing the debuffs is already good enough for me.
i also like to add is that corrupt purge lasts too short and if everyone hears it they become “immersed” and hide out till it runs out.