You need to decide yourself on this one. The vulnerability is a serious problem -- we've seen over 200 different exploits -- but I don't think this is a time to panic.

We have seen dozens of different attacks using this vulnerability since Dec. 27. One exploits image files and tries to get users to click on them; another is an MSN Messenger worm that will send the worm to people on your buddy list, and we have seen several spam attacks.

To the untrained eye Mytob and Zotob can appear quite different: one group of viruses travels via email, the other primarily by exploiting a Microsoft security hole.

There are a tiny number of mobile-phone viruses compared to the threat on the Windows platform.

This worm feeds on people's willingness to receive salacious content on their desktop computer.

This worm feeds on people's willingness to receive salacious content on their desktop computer, but they could be putting their entire company's data at risk.