I'm interested in the Plague's workshop and I want to know if there's any mathmatical function that have been officially publishedto calculate the relation between different abilities and rates.

I want to know this because I want to make my personal module more playable and reasonable.(not to infect too fast or not to kill too fast)

I see that different templates have different functionalities. So it's better to have some thing like a universal funtion?

Could someone help me plz?