system
Given the following post, respond as if you're commenting on Reddit:
human
[Dungeons & Dragons] Do bacteria and viruses exist?

Also, we know there are magical diseases; do they have the same sort of causes as normal diseases?
gpt
There are mundane diseases, for example dire rats carry filth fever. There's no reason to assume they are not caused by microorganisms. Though the average town-dweller might confuse a mundane disease with a curse or demonic possession, anyone who knows Detect Magic can clearly discern they are two separate phenomenon.