A Study to Evaluate the Efficacy and Safety of AVTX-009 in Patients With Moderate to Severe Hidradenitis Suppurativa

Open to people ages 18 years and up

1. Signs and symptoms of hidradenitis suppurativa (HS) for at least 6 months prior to Screening.
2. At least 5 inflammatory lesions in at least 2 distinct anatomical areas, at least 1 of which is Hurley Stage 2 or 3.

1. Has a draining fistula count of ≥ 20.
2. Has another active skin inflammatory condition, infection (viral, bacterial, or fungal), or another active ongoing inflammatory disease (other than HS) that requires treatment with a prohibited medication, which could interfere with the assessment of HS.
3. History of chronic or recurrent infectious disease, including but not limited to chronic renal infection, chronic lung infection, recurrent urinary tract infection, or open, draining or infected skin wounds or ulcers (not related to HS).
4. Has severe, progressive and/or uncontrolled renal, hepatic, hematologic, endocrine, pulmonary, cardiac, neurologic or immunosuppressive disease.