Does my Mac have a Virus?

For my first blog post ever I will attempt to answer the question: Does my Mac have a Virus?

Is the Internet safe for Macs? 

Mac experts at Intego reported that the year 2011 was the most active year for Mac malware in the history of Mac OS X. However, if you're asking me whether or not your Mac is infected with a virus or Mac malware, I know of just a few ways to find out. 

One method is to scan your machine to see if it's infected with a Mac virus. Or perhaps it might be infected with other viruses that your Mac can share with other computers or a network and affect Windows operating systems. Now, you might be asking: Antivirus for Mac, really? 

It's going to be a long year.