If your relative stays at home without contact with anyone from the outside world, they have zero risk of getting the disease. If a relative living in the house needs to leave daily they risk exposure and getting the infection. The relative at home now has a non-zero risk of getting infected.
If the relative at home is independent then they should be ...
TL;DR: please WEAR A MASK!
(unless your nearby hospitals are out of it, in which case give your masks to them and stay at home)
The link you mentioned provides the reason that the CDC likely has in mind (though I agree it doesn't identify it clearly as the reason):
The worldwide supply of masks is limited. It's critical that we use them appropriately. [...
Such claims about drinking water to prevent COVID-19 also appeared online, but major health organizations do not support them.
Health experts say drinking water every 15 minutes does not prevent coronavirus infection (AFP Fact Check, March 9, 2020)
Multiple posts on Facebook and Twitter shared hundreds of times in the
Philippines claim that doctors in ...
There are many factors that can trigger migraine, and part of prevention is learning what your triggers are.
What causes migraines?
Researchers believe that migraine has a genetic cause. There are also a number of factors that can trigger a migraine. These factors vary from person to person, and they include:
Hormonal changes in women