Study of Eblasakimab in Male or Female Moderate-to-Severe Atopic Dermatitis Patients Previously Treated With Dupilumab

Inclusion Criteria: * Male or female participants ≥18 years * Willing and able to comply with clinic visits and study-related procedures * Chronic AD present for at least 1 year prior to screening * Have vIGA score of ≥3 (5-scale of 0 to 4) at baseline * Have ≥10% BSA of AD involvement at baseline * Have EASI ≥18 at screening and baseline * History of inadequate response to, intolerance to or contraindication to a stable regimen of topical corticosteroids (TCS) or topical calcineurin inhibitors (TCI) as treatment for AD * All participants must have previously been treated with dupilumab meeting one of the following conditions: 1. Participants who stopped dupilumab treatment due to non-response, partial response, loss of efficacy must have been previously treated with dupilumab for at least 16 weeks duration; 2. Participants who stopped dupilumab treatment due to intolerance or adverse events (AEs) to the drug may enter the study with no required prior length of dupilumab treatment; 3. Participants who stopped dupilumab treatment due to cost or loss of access to dupilumab or for any other reasons may enter the study with no required prior length of dupilumab treatment; Exclusion Criteria: * Use of immunosuppressive/immunomodulating drugs and/or therapies, JAK inhibitors, or phototherapy (including tanning booth/parlor) within 4 weeks prior to the Baseline visit * Have an uncontrolled chronic disease that may require multiple intermittent use of systemic corticosteroids at Screening, as defined by the Investigator * Have uncontrolled asthma that might require bursts of oral or systemic corticosteroids, or require either of the following due to ≥1 exacerbations within 12 months before Baseline: 1. Systemic (oral and/or parenteral) corticosteroid treatment; 2. Hospitalization for \>24 hours; * Have had systemic treatment with small molecule investigational drugs within 8 weeks or 5 half-lives (if known), whichever is longer, prior to the Baseline visit * Have received treatment with topical corticosteroids (TCS), topical calcineurin inhibitors (TCI) such as tacrolimus and pimecrolimus, topical phosphodiesterase inhibitors such as crisaborole, topical JAK inhibitors (commercial or investigational use), within 1 week prior to randomization * Have inadequate organ function or abnormal lab results considered clinically significant by the Investigator at the Screening visit * History of human immunodeficiency virus (HIV) or positive HIV serology at Screening * Infected with hepatitis B or hepatitis C viruses. For Hepatitis B, all subjects will undergo testing for Hepatitis B Surface Antigen (HBsAg) and Hepatitis B Core Antibody (HBcAb) during Screening. Subjects who are HBsAg positive are not eligible for the study. Subjects who are HBsAg negative and HBcAb positive will be tested for Hepatitis B Surface Antibody (HBsAb) and if HBsAb is positive, may be enrolled in the study; if HBsAb is negative, the subject is not eligible for the study. For Hepatitis C, all subjects will undergo testing for Hepatitis C antibody (HCVAb) during Screening. Subjects who are HCVAb positive are not eligible for the study. Active COVID-19 infection at Baseline. * Have known liver cirrhosis and/or chronic hepatitis of any etiology * Known diagnosis of active tuberculosis or non-tuberculous mycobacterial infection or latent tuberculosis unless it is well documented by a specialist that the patient has been adequately treated * Allergen immunotherapy should be discontinued 6 months before randomization