system
Given the following post, respond as if you're commenting on Reddit:
human
Why does being infected with vaccinia virus vaccine protect you from Smallpox but doesn't protect you from other "pox" such as chicken pox?

Due to my career field I was recently given the vaccinia virus because I was told it's a more "mild" form of small pox, this peaked my interest and I learned the difference between vaccinia and variola virus(small pox) but could not find an answer to my question in regards to the varicella virus (chicken pox). I probably have a misinterpretation on the correlation of the word "pox" but I'd like to know, thank you!
gpt
Chickenpox is caused by the varicella zoster virus and smallpox by the  variola viruses.  Vaccina and variola are poxviruses, varicella zoster virus is not - so it is not surprising that vaccina immunization will not confer any immunity to chickenpox.

"Pox" is an old term dating from the time before we had knowledge of infectious agents and was used to describe a number of diseases that seemed to spread easily and cause skin lesions. For example syphilis was once also known as the "great pox".