How would she be at conference calls, and at teaching others on her committees how to do them? I know that's not for everyone, but her committee skills sound really valuable and her work greatly appreciated.
She'd be fine with it but it wouldn't solve her issue...which is needing to get out of the house she shared with my father when the fact that he's not there gets too overwhelming for her.
You can't force self isolation- but if things get as dire as predicted, everyone over 65 also needs to understand and that if the Italian approach is considered in the UK. You will be left to die, and no extraordinary measures- ventilation, resuscitation will be utilised to try and save you. It's that simple. You catch it, you get very sick. You die.
Most of the over 70s I know already accept that. Hell, I'm 42, healthy, with no co-morbid illnesses and my youngest child is under 2. I don't expect them to try and save me if I get very sick with it either.