malarial pathogen

例句：

1. 1. Malaria is a major public health concern in many parts of the world.
   疟疾是世界上许多地区的重大公共卫生问题。
2. 2. The discovery of this pathogen has led to significant advancements in vaccine development.
   这种病原体的发现已经导致了疫苗开发的显著进步。
3. 3. Researchers are working on developing new treatments for this malaria-causing pathogen.
   研究人员正在研究开发新的针对这种疟疾病原体的治疗方法。