Study of CM383 in Healthy Subjects

Inclusion Criteria: * Subjects age ≥ 18 years \& ≤54 years. * Subjects voluntarily signed the Informed Consent Form and were able to comply with the provisions of this protocol. Exclusion Criteria: * The average number of cigarettes smoked per day is greater than 5 within 3 months prior to screening. * Drinking heavily within 3 months prior to screening, or unable to guarantee not to drink alcohol during the research period, or positive alcohol breath testing. * History of drug abuse within 1 year prior to screening, or positive urine drug abuse screening. * Blood donation or any other form of blood loss exceeding 400 mL, or accepting blood transfusion within 12 weeks prior to screening. * Suspected allergy to Aβ-antibody drugs, humanized monoclonal antibody drugs and their excipients, or other biological agents, or have a history of severe allergic reactions to other drugs. * Severe trauma or undergo major surgery within 6 months prior to screening, or planned surgery during the research period.