Anyone’s LO in assisted living or memory care doesn’t believe there’s a virus? What can I do?

My mom in memory care thinks I’m lying when I tell her I can’t visit because of the virus. The only thing she says when we FaceTime is when am I coming. We are able to have window visits and she gets so angry I spend the first 15 minutes trying to convince her there’s a virus and that's why I can’t come in. She eventually calms down, then it begins again next visit. It’s like 50 first dates. FaceTimes and phone calls are horrible because she can’t hear well. She has hearing aids she got many years ago but never wanted to wear them. And there is no plan to lift visitor restrictions anytime soon.