The upsurge in cases can be explained largely by the increase in the number of unvaccinated children. Americans are learning the hard way that scientifically baseless skepticism about the safety of vaccines is extremely dangerous.
麻疹病例的激增大部分可以解释为未接种儿童数量的增加。美国人以沉重的代价了解到，针对疫苗的没有科学根据的怀疑是极其危险的。