A Study of JNJ-95597528 in Participants With Moderate to Severe Atopic Dermatitis

The purpose of this study is to assess how well JNJ-95597528 works compared to placebo in participants with moderate to severe atopic dermatitis (AD).

Inclusion criteria: * Be otherwise healthy on the basis of physical examination, medical history, vital signs, and 12-lead electrocardiogram (ECG) performed at screening * Meets all the following disease activity criteria: a. Chronic atopic dermatitis (AD), according to American Academy of Dermatology Consensus Criteria with onset of symptoms at least 1 year prior to screening visit; b. Eczema area and severity index (EASI) score greater than or equal to (\>=) 16 at the screening and Week 0; c. validated investigator global assessment for atopic dermatitis (vIGA-AD) score \>= 3 at screening and Week 0; d. \>= 10% body surface area (BSA) of AD involvement at screening and Week 0; e. Documented history (within 6 months before screening) of either inadequate response or inadvisability to medicated topical treatments for AD or inadequate response to systemic therapies (within 12 months before screening) * Must sign an informed consent form (ICF) indicating that the participant understands the purpose of, and procedures required for, the study and is willing to participate in the study * If willing to participate in the substudy, must sign a separate ICF for the corresponding substudy (or substudies) * Willing and able to comply with scheduled visits, treatment plan, laboratory tests, lifestyle restrictions, and other study procedures Exclusion criteria: * History of substance abuse or alcohol abuse within 1 year before screening * In the investigator's opinion, any clinically significant results from the 12-lead ECG, chemistry, hematology, or urinalysis laboratory tests obtained at the screening visit that would affect interpretation of study data or the participant's safety in the study * Known or suspected immunodeficiency, including history of invasive opportunistic infections * Previously received JNJ-95597528 * Has known hypersensitivity or intolerance to JNJ-95597528 or its excipients or to any biologic medication or known allergies, or clinically significant reactions to murine, chimeric, monoclonal antibodies (mAbs), or antibody fragments