Unlike most Word macros, this one appears to work on all versions of Word. As is usual in such things, third party information is more complete and precise than anything out of Microsoft. Basically, the virus is a variant of the AutoClose macro virus, but this one is more deadly. You don't want to get this one. If you have been lax about Word documents, it is time to change your habits.
Macro viruses are by far the most common viruses out there.
Your odds of getting a macro virus as compared to a boot sector virus is better than 3 to 1. Any of the major anti-virus vendors handle this one just fine. But you have to run them. If you exchange Word docs, be sure to update your virus software. Thanks for the suggestion, Bob.