Study in Healthy Participants and Participants With Moderate Atopic Dermatitis & Optionally, Moderate Psoriasis, and/or Mild Asthma

This is a phase 1a/1b, first in human, participant and investigator-blind sponsor-unblinded randomized placebo-controlled multiple dose study of EDP1867 in healthy volunteers and participants with moderate atopic dermatitis and, optionally, moderate psoriasis, and/or mild asthma. This study has been designed to investigate the clinical safety and tolerability of EDP1867 in healthy volunteers, participants with atopic dermatitis, and, optionally, in participants with psoriasis and/or asthma.