The phrase "event in person" refers to attending an event or gathering in real life, as opposed to participating remotely or virtually. It means being physically present at the event, rather than watching or participating through a screen.
This may be a result of previous traumatic events in that person's life or may be due to an inherited chemical imbalance in their blood. (religion-online.org)
Why is depression associated with an increased risk in cardiovascular events in people with stable coronary heart disease? (ebmh.bmj.com)
Not as many people attend professional networking events in person due to the prominence of online networking, but don't limit yourself to just networking events. (inc.com)