A Study to Evaluate Further Therapeutic Strategies With Guselkumab in Participants With Moderate-to-Severe Plaque-Type Psoriasis

Prior treatment

• Has previously received any therapeutic agent directly targeted to interleukin (IL) -23 (including but not limited to guselkumab, tildrakizumab \[MK3222\], risankizumab \[BI-655066\])
• Has received any systemic immunosuppressant (for example, methotrexate, azathioprine, cyclosporine, 6-thioguanine, mercaptopurine, mycophenolate mofetil, tacrolimus, fumaric acid esters), or anakinra within 4 weeks of the first administration of study drug.
• Tests positive for hepatitis B virus (HBV) infection or who are seropositive for antibodies to hepatitis C virus (HCV), unless they have 2 negative HCV RNA test results 6 months apart after completing antiviral treatment and prior to baseline and have a third negative HCV RNA test result at baseline
• Has received natalizumab, belimumab, or agents that modulate B cells or T cells (e.g., rituximab, alemtuzumab, abatacept, or visilizumab) within 12 months of the first administration of study drug
• Has received any anti - tumor necrosis factor (TNF)-α biologic therapy within 3 months before the first administration of study drug

• Has a disease duration of plaque psoriasis of either less than or equal to (\<=2) years or (greater than (\>2) years calculated from date at which first symptoms \[plaque\] were reported by subject to date of screening visit at screening; approximately 40 percentage (%) of participants must have a disease duration \<=2 years
• Has moderate-to-severe plaque-psoriasis defined by a Psoriasis Area and Severity Index (PASI) score \>10 or affected body surface area (BSA) \>10%) and additionally a Dermatology Life Quality Index (DLQI) score \>10 at baseline (week 0)
• Have no signs or symptoms suggestive of active tuberculosis (TB) upon medical history and/or physical examination
• Agrees not to receive a live virus or live bacterial vaccination during the study, or within 3 months after the last administration of study drug
• Agrees not to receive a Bacille Calmette-Guerin (BCG) vaccination during the study, or within 12 months after the last administration of study drug