Experts warn other cheaper products aren't as good, some antivenoms products can cost hundreds of pounds per patient, but as some of the poorest to a most risk. World news from the BBC.

专家警告称，其他产品劣质廉价，许多抗血清药物价格为数百英镑，然而，为危机情况却发地区。BBC全球新闻。

Snake venom, collected from farmed reptiles, has been used to make antisera for snake bites for decades by injecting it into mammals such as sheep and horses, and collecting the antibodies thus generated.

圈养蛇可收集蛇毒。几十年来，人们一直用蛇毒制作抗血清4治疗毒蛇咬伤，还把它注射到绵羊和马这样哺乳动物体内，收取抗体。