system
Given the following post, respond as if you're commenting on Reddit:
human
what is the most important component of viral structure as far as invasion is concerned?
gpt
Specifically concerning invasion, the proteins on the outside of the virus that bind to cell receptors. If you can encourage a cell to take you inside, the rest is (relatively) much easier. As others have pointed out though, the cycle as a whole is much more complicated, but that's the most important part for invasion alone.