virus vaccinium

例句：

1. 1. The vaccine has been proven to be effective in preventing the disease.
   该疫苗已被证明在预防该疾病方面是有效的。
2. 2. Researchers are working on developing a new vaccine for this virus.
   研究人员正在研究开发一种针对这种病毒的新疫苗。
3. 3. The vaccine is being tested on volunteers to ensure it works as expected.
   该疫苗正在志愿者身上进行测试，以确保其按预期工作。