Chattykathy, I don't of course know your elderly mother's circumstances but there are a few actions people can take on behalf of elderly or otherwise vulnerable persons.
Some elderly or otherwise vulnerable people can't self -report and need to be looked at in person, through the window for instance, if possible. If you were to visit some vulnerable relative or friend you can enter their house while you ventilate the place, ensure they are fed, watered, medicated, and toileted , and throw them kisses and smiles. You can carry with you a bleach based spray and cloth and apply it to whatever you touch in their house. Wash your hands a lot. Wear a clean simple mask : two layers of cotton over your nose and mouth is better for trapping droplets than no covering at all. An old fashioned clean cotton overall is better than cumbersome jackets etc.