Check out The Atlantic article, How Loneliness Wears on the Body. Written by Jessica Lahey and Tim Lahey, the piece points out loneliness is almost as big a health risk for elder adults as insecure food sources. The authors describe research published by the Proceedings of the National Academy of Sciences (PNAS) that identifies a strong connection between loneliness and susceptibility to viral infections and inflammation.
The Atlantic article offers a link to the highly technical PNAS research report and it is freely available. Most of us who we want to learn a bit more than The Atlantic piece may be satisfied with the research abstract.
Any of us who have delivered food to the elderly or sick know from experience that our interactions with the recipients is almost as important as the food itself.