Norton Anti-Virus or Macaffee Virex will work fine for you.
Currently there are NO virus's for the Mac running OS X. There are a few, long extinct, for OS 9.x though.
Technically you are quite safe, but to be absolutely sure, and to allow you to sleep nights, get one of the above
well, i am a completely disaster on working with any computers. half a year ago i got a g4 ibook and for the first time in its short life its now connected to the internet. i thought it was quiete safe without any protection but now i read a few postings on an antivirus discussion and i am totally convinced that i really need some antivirus program... which one should i get, especially as i can not spend to much money on it. does antivirus for pc work as well on a mac. thanks for replys...