VIR

例句：

1. 1. The new vaccine is expected to prevent the virus from spreading.
   预计新疫苗可以预防病毒传播。
2. 2. The virus has infected millions of people around the world.
   这种病毒已经感染了全世界数百万人。
3. 3. Vaccines are a crucial tool in controlling the spread of viruses.
   疫苗是控制病毒传播的关键工具。