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

猴痘是一种口蹄疫病毒，与天花和牛痘病毒有关。

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。

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

例如，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。

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

例如，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。