specific active immunity

例句：

1. 1.The vaccine is designed to provide specific active immunity against the virus.
   这种疫苗旨在提供针对该病毒的特异性主动免疫。
2. 2. Vaccines are a critical component of public health efforts to prevent and control infectious diseases.
   疫苗是公共卫生努力预防和控制传染病的关键组成部分。
3. 3.In recent years, there has been increasing interest in developing new vaccines that can provide specific active immunity against emerging infectious diseases.
   近年来，人们越来越感兴趣于开发新的疫苗，以提供对新兴传染病的特异性主动免疫。