Is it normal for a workplace to not invite an employee to the work Christmas party just because theyre on medical leave?

Earlier today, my coworker posted about the workplace Christmas party for our work, which apparently is tomorrow. I had no idea. Just wondering if this is normal practice when one goes on medical leave, as this whole thing is very new to me.

Is it normal for a workplace to not invite an employee to the work Christmas party just because theyre on medical leave?
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