我还记得我十来岁的时候在儿科病房工作，常常目睹儿童因小儿麻痹症、麻疹和破伤风丧命，而这些疾病可以简单地通过疫苗预防。
I remember working at a pediatric ward as a teenager and watching children die from diseases like polio, measles, and tetanus – all easily prevented by vaccines.