接种疫苗

例句：

1. 1.The doctor vaccinates the children against measles every year.
   医生每年给孩子们接种麻疹疫苗。
2. 2. Vaccination is an important measure to prevent diseases.
   疫苗接种是预防疾病的重要措施。
3. 3. The vaccine was developed to protect people from smallpox.
   这种疫苗是为了保护人们免受天花病毒的侵害。