I'm tempted to wear a mask at home so she doesn't get sick from me, but would it be better for her to be exposed to these types of things?
Yes it's better if she is exposed with a small viral load, and no it's NOT good for you to wear a mask.
Surgical masks, as masks go, sit at 1.9% average particulate matter discharge.
The higher you go, the better it gets, up to N95 with no outlet and N99 w/no outlet(exhaust valves). For the latter 2, the costs(lymphocyte apoptosis/ bacterial infection etc.)from breathing your own exhaust cause your immune system added stress which is counterproductive.
Although your heart is in the right place, it's better just to avoid direct exposure as much as possible, and do the normal sick preventions.
Lots of water, teas etc.
List of supplements:
NAC(banned from Amazon, by direct from "NOW essential")
Vitamin D, 125mcg per 175#
Vit C(emergen-c) 10,000mg daily
Quercetin with bromelain
Zinc(>50mg-200)
Selenium
Melatonin @ night & resting(up to 12mg)
Echinicia w/goldenseal
Magnesium, lysine.
Elderberry, and all dark antioxidant berries.
All these are better directly.
Juicing dandelion greens with carrots etc. will rocket your immune system.
Also pineapple skin tea, and celery root.
She should be doing at least half these, you ALL.
GL.