It's been long enough since this came out that I feel the need to gush about something specific way near the end and it didn't look like anyone else brought it up. Dash's comeuppance wasn't borne from fear it was borne from this "empathy terror". She wasn't necessarily afraid the zombies were hurting her, her panic was because she felt responsible for hurting them.
The panic in her voice when she was all "no! You don't want these! They're making you sick!" was absolutely heart wrenching. Because they weren't enemies to her, they were still all her friends and she didn't know how to help them.
