Sterile Masks should block miasma.

[Kotlol]

We want to buff and change how miasma works.
The problem right now is.. it's annoying and if you are the one to clean it or want to clean it you are punished for it.. Not the people who ignore it.

By making it a disease spread it means going through the cloud won't punish you right away, but staying in it and letting it spread does.