The Rebbe expresses joy at the recipient’s improving health and advises not to worry about sleep if following medical guidance. He recommends keeping a kosher mezuzah near the bed and shares a teaching from the Rebbe Maharash about having Shivisi Hashem visible. He encourages checking on the religious observance of nearby neighbors and concludes with blessings for a full recovery.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/shevat/900