Make Disease chemical actually makeable.

[Kotlol]

We even already do have poisons that make you explode haha I don't think adding patho chems to the pool would really add much.  They were designed for a different system, if you want more chem poisons then I think it would be better to design some new ones with the chem system in mind instead of trying to explain how chemists are making patho viruses out of chemicals

Well technically life did come to be via a chemical reaction supposably.
But.. that's super science speculation.

It would just be fun for doctors having to cure a "chemical" disease and antagonists brewing these diseases and putting them in drinks.
Kinda like "They poisoned the water well"

Heck some diseases just appear in water sources if left unchecked.
So yea...
It's more different from Chem Poisons. As that is mostly cured with charcoal, flushing the system and such.
A disease means doctors gotta go with a more active approach of cleansing it. Thus making doctoring more fun.