A First in Human Study to Assess Safety, Tolerability and Pharmacokinetics of a Single Dose of REGN22044 in Healthy Adults

Key Inclusion Criteria:

• Is judged by the investigator to be in good health as described in the protocol

Key Exclusion Criteria:

• History of clinically significant cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematological, psychiatric, or neurological disease, as assessed by the investigator
• Use of any prescription or non-prescription medications or nutritional supplements from approximately 14 days or 5 half-lives, whichever is longer, prior to administration of study intervention or any planned use through the end of the study, except the permitted medications as listed in the protocol
• Participants with fever (>38°C) associated with infection, or chronic, persistent, or recurring infection(s) requiring active treatment with antibiotics, antivirals or antifungals within 8 weeks prior to the screening visit or the randomization visit, or other frequent recurrent infections deemed unacceptable as per investigator judgment
• Evidence of active or latent tuberculosis (TB) as documented by medical history and examination

Note: Other protocol defined Inclusion/ Exclusion criteria apply.