It's not as simple as "senior only hours", though that would certainly help some. As soon as schools reopen, grandparents everywhere would be taking a much larger risk by merely spending time with their grandkids, the majority of whom have been mostly isolated from the virus for the last 4 months but will have a much higher chance to be exposed to it in school. And then, that one grandparent who decided the risk was worth it could catch it and spread it to others during the grocery store's "senior only hours". It's not a simple problem. It's never been a simple problem.