D&D 5E Weird Situation Re: Disease, Death and Undeath- How Would You Rule?

[the Jester]

Okay, so a weird situation came up in my game when the pcs were mucking around with an obelisk that could grant random Chaos traits when touched.

The bottom line: The pc in question was infected by two slaad-born diseases (from a red and blue slaad). Then, upon touching the obelisk, he turned undead.

So! 5e doesn't really talk all that much about diseases, and doesn't have a very robust set of rules for disease. There are, AFAIK, no rules except for the rules for specific diseases and a few spells/items that interact with diseases. There is also no blanket undead immunity to disease; but then again, neither fire elementals nor stone golems nor wraits are described as being immune to disease. While I can see a cool argument for fire elemental specific diseases (for example), I still have a hard time picturing how that elemental might be affected by, for instance, slimy doom. So I'm taking it for granted that 5e hasn't thought too hard about diseases. Now, on to my questions.

Question 1: If a pc has a disease, dies and is raised, does the disease remain in effect?

Question 2: If that pc instead becomes undead without dying in between, does the answer change?

For instance, one of the diseases in question implants a slaad egg in the subject, which takes quite a while to mature before 'hatching'. If the subject dies, does the egg? It makes sense to me that it would, but the rules are silent on this. Likewise, does chaos phage affect a creature after it dies?

 

[delericho]

The raise dead spell actually covers this - non-magical diseases are cured but magical ones are not.

 

[the Jester]

The raise dead spell actually covers this - non-magical diseases are cured but magical ones are not.

Oho! There is a rule in there somewhere!

 

[Azurewraith]

I guess question 1 has been answered as for question 2 i would say a disease can affect unleaded as long as it doesn't cause death or require the brain.

 

[iserith]

Question 2: If that pc instead becomes undead without dying in between, does the answer change?

For instance, one of the diseases in question implants a slaad egg in the subject, which takes quite a while to mature before 'hatching'. If the subject dies, does the egg? It makes sense to me that it would, but the rules are silent on this. Likewise, does chaos phage affect a creature after it dies?

The eggs hatch into slaad tadpole spirits (specters for the stats) under the control of the undead PC. As an action, they can be summoned from a gaping hole in his or her chest and act on their own initiative. They can be dismissed as a bonus action. Once destroyed, they're gone forever.