For example, they're looking into whether less virulent relatives of coronavirus could protect against COVID-19 the way vaccinia protects against smallpox.

，他们在研究毒性较低的冠状病毒亲属能否像牛痘预防天花那样预防新冠肺炎。

Monkeypox is an Ortohopoxvirus that's related to smallpox and vaccinia virus.

猴痘是一种口蹄疫病毒，与天花牛痘病毒有关。

But the vaccinia virus is only distantly related to the variola virus that causes smallpox.

但是牛痘病毒与引起天花的天花病毒关系疏远。

Dead Patches British microbiologist Frederick William Tort was the first to encounter bacteriophages in 1915. He was trying to culture the vaccinia bacteria used to create the smallpox vaccine, but kept finding transparent patches of dead bacteria.

“死亡斑点” 英国微生弗雷德里克·威廉·托特在1915年首次发现了噬菌体。 当时他正试图培养用于制造天花疫苗的牛痘病毒，却不断发现透明的死细菌斑点。

For example, they're looking into whether less virulent relatives of coronavirus could protect against COVID-19 the way vaccinia protects against smallpox.

，他们正在研究毒性较弱的冠状病毒亲属是否可以像牛痘预防天花一样预防 COVID-19。

Although Jenna did not know it, cowpox is caused by the vaccinia virus, which can be transmitted to humans and is closely related to the variola virus responsible for smallpox.

尽管詹纳并不知情， 牛痘是由痘病毒引起的，这种病毒能传染给人类， 并与负责引发天花的痘病毒密切相关。