Kathleen, given your husbands age and underlying medical condition surely he is at higher risk of dying if he gets it? I understand the need to see your children though.
I wasn't looking forwards to the first Xmas we spent without visitors but actually I enjoyed it. It was stress free - no need for the house to be sparkling, didn't matter that turkey wasn't in the oven at 6am, got up in jimjams, watched what we wanted on TV (no queen's speech) etc. I don't think anyone should be on there own unless they choose to be but there are worse things than a visitor free Xmas. In the next few months the vulnerable will be vaccinated and normal life can resume.