I've been hearing in todays news about a virus that can affect mac computers.  When purchasing my Mac computer I was informed I didn't need virus protection.  What do you advise now?

Currently my mac doesn't have additional virus protection software.  When purchasing my mac 4 years ago I was told it wasn't necessary because it was so rarely needed due to Mac's Encryption etc.  With today's news I hear that it possible the current virus or bug that is out there is aimed at Mac's especially.  What is the advice now?

It's not a virus. It's just the latest scare tactic promulgated by popular media outlets to ensure the uninformed among us remain uninformed. The fact that you (or they) characterized it as a "virus" is proof of that, on its face.
What is the advice now?
If you are running a web server, apply the patch by downloading it from the GNU project archive. If you don't know what that is, how to obtain it, or how to apply it to your server, then you are not affected and there is nothing you need to do.
Apple announced they are "working to quickly provide a software update for our advanced UNIX users."
There are plenty of bad things that could happen to a system due to existing vulnerabilities, known or unknown. There is no reason for any more concern today than there has ever been. Bash has been included with OS X for years, perhaps since its inception, and the particular flaw that was just discovered may have existed for years prior to that.
Similar vulnerabilities may also be discovered and exploited, now or in the future. The resulting effects, if there are any, cannot be accurately predicted.
Until then:
Ignore hyperventilating popular media outlets that thrive by promoting fear and discord with entertainment products arrogantly presented as "news". Learn what real threats actually exist and how to arm yourself against them.
Do install updates from Apple as they become available. No one knows more about Macs and how to protect them than the company that builds them.

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