Apple Rejects Kaspersky Anti-virus iPhone Application
The iPhone OS is a great operating system and is also one of the safest. That's why Apple rejected the anti-virus application developed by Kaspersky Lab. Such app will never make it to AppStore, just because users don't need it.
Some users who run the jailbreak might catch a virus. However if they do everything right - there will be no troubles and no viruses.
Another popular antivirus program is eset nod32 antivirus.