Featured image: Goblet cells (stained blue) in a colon section from interleukin 1α knockout mice (cohoused with wild-type mice) obtained on day 14 after initiation of dextran sodium sulfate treatment. [See related article: M. Nunberg et al., mSystems 3(3):e00213–17, 2018.] Copyright © 2018 Nunberg et al. This content is distributed under the terms of the Creative Commons Attribution 4.0 International license.