Antivenin Against Vipera Russelli Siamensis(Shanghai Serum Bio-Technology)

Primary objective: To evaluate the safety and tolerability of different doses of antivenom in healthy subjects under single-dose conditions. Secondary objectives: 1) To evaluate the pharmacokinetic characteristics of antivenom in healthy humans. 2) To explore the changes in the immunogenicity of antivenom in healthy subjects after intravenous injection of antivenom. 3) To explore the changes in the neutralization ability of antivenom in subjects against in vitro snake venom toxins after administration.