HHV

例句：

1. 1. The H5N1 virus has been responsible for several outbreaks in recent years.
   H5N1病毒近年来已经导致了几起疫情。
2. 2. The new vaccine is designed to protect against the H1N1 virus.
   新疫苗旨在预防H1N1病毒。
3. 3. The researcher isolated the H5N1 virus from a patient's sample.
   研究员从患者的样本中分离出了H5N1病毒。