diphtheria toxin

例句：

1. 1.The outbreak of diphtheria has caused widespread concern among the public.
   白喉疫情引起了公众的广泛关注。
2. 2. Researchers are studying the effects of this toxin on human health.
   研究人员正在研究这种毒素对人类健康的影响。
3. 3.The toxin is responsible for causing the disease, which can be fatal if left untreated.
   这种毒素是导致这种疾病的原因，如果不治疗可能会致命。