This study checks if a medicine called RO7790121 works and is safe for people with moderate to severe atopic dermatitis (AD). AD is a skin condition that makes the skin red, itchy, and inflamed. To join, you need an AD diagnosis from at least a year ago and must use a plain skin cream daily. People with other skin issues or using certain medicines can't join.
- The study involves **regular visits** to check skin health and medicine effects.
- **No payment** is mentioned for joining the study.
- Participants must stop using some skin and oral medicines before and during the study.