virion

例句：

1. 1. Viruses are tiny infectious agents that can cause diseases in humans and animals.
   病毒是微小的、能引起人类和动物疾病的传染性病原体。
2. 2.The discovery of a new virus has raised concerns about its potential to spread rapidly.
   发现一种新的病毒，引发了对其可能迅速传播的担忧。
3. 3. Researchers have been working tirelessly to develop vaccines against the latest virions.
   研究人员一直在努力开发针对最新病毒的疫苗。