macro viruses and usb

I got a little question. Assume PC X has a macro script. I insert my USB into PC X and take out a .rar file. Then I take out my USB.

Will my USB files be infected with this macro script?

Just a question!

Thanks

Macro virus (computing)
http://en.wikipedia.org/wiki/Macro_virus_(computing)

Virus Encyclopedia
http://www.viruslist.com/en/viruses/encyclopedia

Usually makro-script infections need to be run somehow (some program opens it).
If it is transfered to your USB stick in a compressed file, like ‘rar’ it can’t infect your system by itself, nevertheless u shouldn’t run/open it from there - delete it asap, u can also scan your USB stick and let avast delete it.
asyn

I have a major problem though.

How can I be 100 % sure my word files do not have any macro script? Scanning with avast is not enough I know because it might be something new, or maybe all macro scripts can be detected because of their simplicity? I might be wrong. I think all anti viruses with their heuristic scans can find macro viruses.

Is there any other way?

Try more scanners

Norman Malware Cleaner http://www.norman.com/support/support_tools/58732/en-us
Dr.Web CureIt! http://www.freedrweb.com/cureit/?lng=en
How Do I Use Dr.Web CureIt!? http://www.freedrweb.com/cureit/how_it_works/