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.
up vote 3 down vote. The normal usage would be nostalgia for, as nostalgia is a noun and nostalgic is an adjectival form of nostalgia or a noun meaning a person who displays nostalgia for something â an irrelevant sense in your example.