Opportunistic infections (OIs) are infections that occur more frequently and are more severe in individuals with weakened immune systems, including people with HIV.
Being nostalgic means to miss the past time. It seems that a real life was in the past because now in the present is different, probably things changed and we know that never is going to be the same. It leads to a nostalgic feeling.
Loneliness is a negative state, marked by a sense of isolation. One feels that something is missing. It is possible to be with people and still feel lonelyâperhaps the most bitter form of loneliness. Solitude is the state of being alone without being lonely.