As with most of this stuff, if you receive an email from a suss source, just delete it. If you do happen to open it, a lot of people have a preview of email below the inbox, don't click on any of the links.
We had a couple of staff members at work (and my sister) who used to always forward these "warnings" on. If the warning says things like "it will erase all your files", "the worse virus yet found", "cannot be removed" and other "armageddon" type descriptions....just delete the warning and don't forward it, or at least google it first. If you google this virus, the McAffee site, for example, rates the risk as low. In many cases the warning is the "virus", the creators often just want to see how long before someone forwards the original email on to them

. Forwarding this stuff to everyone, as they usually suggest, just clogs the internet and slows us all down