Kama Sutra / W32.Blackmal.E worm questions

I have Norton AV and it was updated on Jan. 17 2006 with the entry:

W32.Blackmal.E@mm
CME-24, Win32.Blackmal.F [Computer Associates],
Email-Worm.Win32.Nyxem.e [F-Secure], Email-Worm.Win32.Nyxem.e
[Kaspersky], W32/MyWife.d@MM [McAfee], W32/MyWife.d@MM!M24 [McAfee],
W32/Small.KI@mm [Norman], Tearec.A [Panda Software], W32/Nyxem-D
[Sophos], WORM_GREW.{A, B} [Trend Micro]

Will I be okay no matter what?

Is there a way you can get this worm without opening email attachments?

I just saw a CNN report where they did not mention that you can get it
by opening attachments. But the mainstream media doesn't explain these
things very well.

.