@datum And if you're interested in having other fluid-resistant options available, it's a feature noted on all the relevant models in the Sourcing section of the Masking Reference Doc here:
https://texanalysis.com

For instance, lots of folks really like the comfort and low breathing resistance of the 3M VFlex 9205 along with the fact that they cost less than a dollar a piece.
The 3M VFlex 1804 version adds fluid-resistance to that list of good qualities.

@datum @Lkdc Conveniently, the fluid-resistant 3M Aura 1870+ is available by the ~440ct case for only $50:
https://amazon.com/dp/B0937JGMY7

So, you can go with a combination of giving the bathroom time to air out plus wearing a respirator to reduce the risk even further.

(Not all respirators are likely to hold up quite as well as the 3M Auras did, so you shouldn't assume that this testing applies perfectly to all other models. However, many quality models should still function ok when damp.)

@datum @Lkdc Yes, as much fresh airflow and time as you can give it is good. It will pretty much always help to wait as long as you're able.

Also, if you can arrange a setup to wash just your face in a lower risk environment, like outdoors with a bowl of water or something, then you can shower with a respirator on. It's not anyone's first choice, but for the couple weeks while the other person is sick, it can be a reasonable precaution. Here's some testing with 3M Auras:
https://xcancel.com/AdvancedTweaker/status/1815930182064300274

@violetblue Sometimes, the world is very small. I know of the neon green person through a charity fundraising event for getting games & toys into children's hospitals - Desert Bus For Hope.