the chances of anyone actually reading this warning and then getting sent the particular virus is very small.
Its basic etiquette to NEVER open attachments to emails unless your expecting them, even if its someone you know.
The main point is, if your passing the warning around, then the Anti-Virus company's already know about the threat, and have updated their definitions already.
A better message to send around would be "Remember NEVER to open attachments EVER, unless you are expecting them."
Passing the message on to your friends just creates yet another 'spam' email for the servers to cope with.
Better practice should be to Email someone IF they send out a suspect email, as they probably dont even realise their PC has been used to send it, and will be unaware of any infection.
If we all sent a warning about EVERY email scam and virus, imagine how full our inbox would get...
Let the security on your computer do its job, and use the grey matter between your ears before you open those email attachments!