http://blog.washingtonpost.com/securityfix/
Apple: Mac Users Should Get Antivirus Software In a notable shift, Apple is now recommending that Mac users install anti-virus software to help users secure their systems.
In a technical note quietly published to its support site on Nov. 21, Apple issued the
following advice:
"Apple encourages the widespread use of multiple anti-virus utilities so that virus
programmers have more than one application to circumvent, thus making the whole virus writing process more difficult." * not one but multiple anti-virus scaner's *