Fever Fetish questions

[PvK]

Gem production from fetishes varies from turn to turn. Disease kills by reducing hit points to zero, at a rate of one per month. Regeneration will stop this reduction, and reduce the chance of afflictions each month, but it won't prevent more afflictions that might appear from disease.

I'm not sure if the amount of health lost or afflictions has any effect on the rate of fire gem production or not.