Have sterile masks block miasma

[aft2001]

Sterile masks 10,000% should provide strong (though imo not quite *full*) protection against miasma. Perhaps they could degrade with exposure to it, who knows, but it'd definitely make life a lot easier.

As for functionality, they *should* help to prevent disease spread, but if they did something like reducing the chance for failure when doing surgery or reduced the amount of chems inhaled from gas clouds and chem reactions, that'd be awesome too.