Q: Does my macbook pro need an antivirus?, Does my macbook pro need an antivirus?

i would use nothing more than ClamXav, which can be downloaded for free.

no.

Nex time search before posting.  your question has been asked and answered dozens of times already.

Helpful Links Regarding Flashback Trojan and Virus Protection

An excellent link to read is Tom Reed's Mac Malware Guide.

Also, visit The XLab FAQs and read the FAQ on malware.

For general anti-virus protection I only recommend using ClamXav.

Tom Reed has tested several AV utilities including ClamXAV only to find that none of them are particularly reliable. Fortunately, there are no viruses in the wild to worry about. Tom's Malware Guide is a must read.