My grandparents will be celebrating 65 years of marriage in a few months. The anniversary is celebrated with a big party for the extended family and my grandparents' friends.
Many of my grandparents' friends are old people (85+) with bad health conditions. We know of at least two friends with such a bad health, that they might not be alive in a few months.
My grandfather is not comfortable inviting his old friends that he knows are very sick. He fears an invitation will indicate a lack of understanding for their situation and/or remind them of their bad health and limitations.
My counter argument is that an invitation will make them feel remembered and loved, and that he is doing his friends a disservice by holding them in oblivion.
The truth is that I'm very unsure about how to handle this situation. My grandfather has known many people throughout his life that are now dead, and my experience with terminally ill people is non-existing.
I want to convince him that not ignoring his sick friends is the right thing to do, which is why I request your help in formulating an invitation.
Question: How can we frame an invitation to very sick people, taking their situation into account and imply that we know they can't go?