The "Comment:" command directive does nothing. It exists so script-writers can place explanatory comments into their scripts, making them easier to read and understand.
How do I use it?
Place a "Comment:" line anywhere in your script, and then all successive lines in the script will be ignored as comments until a new command directive is read.
When do I use it?
Whenever you want your scripts to be readable!
This script will remove all known variants of [some infection].