Social anxiety is all-encompassing.
People with social anxiety fear social situations and events, they do NOT fear having panic attacks. They fear the high amount of anxiety experienced before, during, and after a social event. Social anxiety and agoraphobia are light years away in terms of operational definitions. Social anxiety is a fear of social activities, events, and the people associated with them, which leads to high levels of anxiety, and, therefore, motivates the socially-anxious person to avoid them. The fear is of having a panic attack, not a fear of social situations and other people.