A Study to Evaluate How the Study Drug Moves Through the Body, Adverse Events, and How the Body Tolerates ABBV-547 Injections

Inclusion Criteria

• •A condition of general good health, based upon the results of a medical history, physical examination, vital signs, laboratory profile and a 12-lead electrocardiogram (ECG).
• •Part 1: BMI is \>= 18.0 to \<= 29.9 kg/m\^2 after rounding to the tenths decimal at Screening. BMI is calculated as weight in kg divided by the square of height measured in meters.
• •Part 2: must have discontinued use of phototherapy (e.g., UVA or UVB) at least 2 weeks prior to the baseline visit (Day 1) and PUVA phototherapy at least 4 weeks prior to the baseline visit (Day 1).