Dubbed MyDoom.as, MyDoom.au, or MyDoom.bb -- depending on the anti-virus vendor -- the worm is essentially the same as MyDoom.o, which debuted in July 2004. The biggest difference, said experts ...

The virus, however, was expected to taper off over the next 24 hours, Huger said. "Mydoom" arrives in a zip file carried in an e-mail with the subject lines "test," "mail delivery system," or ...