germ theory

例句：

1. 1.The germ theory of disease suggests that the cause of many diseases is a virus.
   病原体理论认为许多疾病的起因是病毒。
2. 2.The germ theory has been widely accepted by medical professionals.
   病原体理论已被医学专业人士广泛接受。
3. 3. The germ theory has led to significant advancements in vaccine development.
   病原体理论在疫苗开发方面取得了重大进展。