And that's because people are routinely exposed to PEG in cosmetic and household products, and some people have already developed antibodies against PEG. But why would this happen to some people and not to others?

这是因为人们经常会接触到化妆品和家用产品中的 PEG，并且有些人已经产生了针对 PEG 的抗体。但为什么这会发生在某些人身上而不是其他人身上呢？