Mom will be 100 in October. She was diagnosed with dementia in 2008, and now resides in memory care. She has tested positive for COVID repeatedly, but has never shown a single symptom -- no cough, no fever. She is, of course, in quarantine, so I have to visit her through a window or, weather permitting, a fence, which I do daily. Has anyone had this experience, or even heard of someone this old testing positive and showing no symptoms?