The holidays are a joyous occasion for most people. But for someone with cancer or other serious illness, it can be a time of overwhelming anxiety and fear. And as family and friends get together, it’s important to show that you care without coming across as insensitive. Lynne Vitagliano, a clinical social worker at Mayo Clinic, offers some helpful advice to make those uncomfortable conversations less awkward. Watch: The Mayo Clinic Minute Journalists: Broadcast-quality video…