Yes, at least to me anyway. There are no existing viruses for the Mac, and while there are trojans and spyware, you most likely won't have to deal with them providing you don't spend all of your time downloading software from unknown developers.
In case you ever feel like you may have installed some nasty software, I recommend using Virus Barrier; it's the most widely-used and trusted spyware/adware/malware/etc protector for OS X.