Inclusion Criteria:
* Provide informed consent - Be willing and able to sign a consent form after understanding the study and before any study-related procedures are performed.
* Age - Be a healthy adult male or female aged 18 to 55 years.
* Body weight and BMI - Have a Body Mass Index (BMI) between 18.0 and 32.0 kg/m². Weigh more than 50 kg and less than 120 kg.
* For women who can become pregnant - Have a negative pregnancy test before participating.
* Use highly effective birth control during the study and for 15 months after the last study dose.
Exclusion Criteria:
You cannot participate in this study if any of the following apply to you:
1. Medical Conditions
* You have a serious or ongoing health condition affecting the heart, lungs, liver, kidneys, digestive system, hormones, nervous system, immune system, or mental health.
* You have a history of severe allergic reactions, anaphylaxis, or are allergic to the study drug or its ingredients.
2. Infections
* You test positive for HIV, hepatitis B, or hepatitis C.
* You have tuberculosis (TB), a history of TB, recent close contact with someone who has active TB, or a positive TB screening test.
* You test positive for COVID-19 before receiving the study drug.
* You have an active or long-term infection requiring treatment.
* You have needed antibiotics or other anti-infective treatment within the last month.
* You were hospitalized or required intravenous (IV) treatment for an infection within the last 3 months.
* You have a history of certain recurring infections, such as shingles (herpes zoster).
* You have a fever higher than 37.7°C during screening or within 7 days before dosing.
* In some cases, minor abnormalities may be accepted if the study doctor considers them not clinically important.
4\. Heart and Blood Pressure Problems 5. Previous Medications or Treatments
* You have previously received medicines that target TNFα or IL-23.
* You have received other biologic medicines within the last 6 months.
* You have used medicines that significantly suppress the immune system within the required washout period.
* You have recently used prescription or over-the-counter medications that could affect study results.
* You received a live vaccine within the last 12 weeks or any other vaccine within the last 4 weeks.
* You donated blood, plasma, or platelets too recently before joining the study.
6\. Alcohol or Drug Use. 7. Pregnancy and Reproductive Considerations
* You are pregnant, breastfeeding, or planning to become pregnant during the study period.
* You are unwilling to use the required birth control methods.
8\. Participation in Other Research Studies
* You have recently participated in another clinical trial involving an investigational drug or device.
* You have previously participated in this study.
9\. Ability to Participate
* You are unable to understand the study requirements or provide informed consent.
* You are unable or unwilling to follow study procedures and visit schedules.
10\. Conflict of Interest
* You are an employee of the study sponsor or investigator, or an immediate family member of one.
11\. Other Safety Concerns
* The study doctor believes that participating could put your health at risk, prevent you from completing the study, or affect the reliability of the study results.
