牛痘的

例句：

1. 1. The vaccine against swine flu is effective in preventing the disease.
   针对猪流感的疫苗有效预防该疾病。
2. 2.The study found that vaccination could significantly reduce the risk of contracting the virus.
   研究发现，接种疫苗可以显著降低感染病毒的风险。
3. 3.The outbreak of the virus has led to a global health crisis, prompting people to vaccinate their pets.
   病毒爆发引发了全球健康危机，促使人们为宠物接种疫苗。