immunologist

例句：

1. 1. Dr.Smith is an expert in the field of immunology.
   史密斯博士是免疫学领域的专家。
2. 2.The research on vaccines has greatly advanced our understanding of the immune system.
   疫苗研究极大地促进了我们对免疫系统的理解。
3. 3. Immunologists are responsible for developing and testing new treatments for infectious diseases.
   免疫学家负责开发和测试新的治疗传染病的方法。