The next tier is secondary prevention where we try to slow the progression of the disease in infected people.

下一层是二级预防，我们试图减缓感染者的病情发展。

But we also saw this in public health, where targeted tertiary and secondary prevention performed better than more generalized primary prevention.

但我们在公共卫生领域也看到了这一点，有针对性的三级和二级预防比更广泛的一级预防表现更好。