Faery Queens healing ability

[JJ_Colorado]

Hi,

How does the healing ability of Faery Queens work?

My assumptions are:
1) affects both troops and commanders
2) not affected by how many troops are in the province. In other words if I have a specific afflicted unit that I want to have healed it won't matter if I put that unit alone in a province with a Faery Queen or put it in a province with a Faery Queen and 100 other afflicted units.
3) Very low chance of healing because I have yet to observe a unit actually get healed from an affliction.

Thanks for any insight on this topic.

John