picodnavirus

例句：

1. 1. This new strain of virus has been causing outbreaks in several countries.
   这种新的病毒株已经在几个国家引发了爆发。
2. 2.The researchers found that the virus had mutated to become more contagious.
   研究人员发现，该病毒已经变异以变得更具传染性。
3. 3.The outbreak is being investigated by the World Health Organization and local health authorities.
   世界卫生组织和当地卫生当局正在调查这一疫情。