A Study to Investigate the Safety, Pharmacokinetics, and Pharmacodynamics of VIS954 in Healthy Adult Participants

Exclusion Criteria

• •1. Participant has a history or current evidence of a serious and/or unstable cardiovascular, respiratory, gastrointestinal, hematologic, autoimmune, blood dyscrasias or other medical disorder, including psychiatric disorders, cirrhosis, or malignancy. History of minor skin cancers (not including melanoma) or surgically treated, limited cervical carcinomas (ie, carcinoma in situ) are not exclusionary.
• •2. Participant is participating in another clinical study of any investigational drug, device, or intervention or has received any investigational medication during the last 30 days or 5 half-lives, whichever is longer, before baseline (Day -1).
• •3. Previous receipt of antibody or biologic therapy.
• •4. History of a previous hypersensitivity or severe allergic reaction with generalized urticaria, angioedema, or anaphylaxis to any of the ingredients of the VIS954 SC injection formulation.
• •5. Blood pressure \> 160/100 mmHg or \< 90/50 mmHg (may be repeated once if abnormal), at the screening visit or Day -1.
• •6. History of any infection requiring hospitalization or treatment with antivirals, antibiotics, or systemic antifungals within 3 months prior to screening.
• •7. Received a vaccination, other than COVID-19 vaccination, during the 30 days prior to administration of the first dose of study intervention. A COVID-19 vaccination cannot be received within 7 days prior to the first dose of study intervention and until 14 days after the last dose.
• •8. Has received any prescription or nonprescription (over-the-counter) medication during the last 30 days or 5 half-lives, whichever is longer, preceding baseline (Day -1), with the exception of acetaminophen, ibuprofen, naproxen (or other over-the-counter nonsteroidal anti-inflammatory drugs \[NSAID\]), hormonal contraceptives, topical medications, vitamins, and dietary or herbal remedies.
• •9. Any participant who has a recent history of alcohol or drug/chemical abuse, at the discretion of the investigator, will be excluded.
• •10. Enrolled participants must abstain from consumption of nicotine containing products from Day -1 through discharge.
• •11. Enrolled participants must abstain from consumption of cannabinoids from Day-1 through end of study.
• •12. For the duration of the study, enrolled male participants should not consume more than 15 standard drinks per week (7 days) and female participants should not consume more than 10 standard drinks per week (7 days). A standard drink equals 10 g of alcohol. Enrolled participants must abstain from consuming alcohol 48 hours prior to check-in on Day -1 through discharge.
• •13. Participant with a positive urine drug or alcohol breath screen test result at screening or Day -1. The urine drug screen and alcohol breath screen may be repeated once at the discretion of the investigator. The urine drug screen also screens for methylenedioxymethamphetamine and propoxyphene. If a participant tests positive on these tests, inclusion of that participant into the study will be based on the principal investigator's judgment with consultation, as needed, with the medical monitor and the sponsor.
• •14. Any chronic infectious disease (eg, chronic urinary tract infection, chronic sinusitis, bronchiectasis, active pulmonary or systemic tuberculosis \[TB\], chronic viral hepatitis such as hepatitis C or hepatitis B, or human immunodeficiency virus \[HIV\] infection).
• •15. Participant who has donated \> 500 mL of blood within 60 days prior to start of the screening visit or the participant has donated any plasma within 7 days prior to baseline (Day -1).
• •16. Coronavirus disease 2019:
• •* Current symptoms of infection.
• •* Diagnosis of COVID-19 (reverse transcription polymerase chain reaction \[RT-PCR\], antigen testing, or clinical diagnosis) in the 21 days prior to screening.
• •* Ongoing diagnosis of "Long-COVID" symptoms, due to a prior COVID-19 infection.
• •17. Is an employee of the clinical research team (any sponsor or research site employee), or has a family member who is an employee of these organizations.
• •18. Participant is judged by the investigator or the medical monitor to be inappropriate for the study.