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.
A phobic feeling or reaction results from or is related to a strong, irrational fear or hatred of something. Many children acquire a phobic horror of dogs. 2. adjective. Someone who is phobic has a strong, irrational fear or hatred of something.