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。