Instead of exposing your dear one to such negative influences, try and increase his interaction with the strong, positive and cheerful people in your community. Surround him with those who show acknowledgment and support, instead of fear, pity or sympathy.
Caring for a chronic patient, need not be conveyed by a display of sorrow and grief. Solidarity, enthusiasm, humor and thoughtfulness are far better means. Show him all the beauty in living, so that he is motivated to return to a state of well being.
If all that he sees is despair and despondence, there will be nothing worth fighting for.