Thanks for the response.
My main PC is running a Avast scan direct from bootup (blue screen) and it indicated that several music files were infected with "WMA:wimad [drt}". The files are/were deleted from the PC. But I have them on my ipod. I believe the ipod file format is different, but I am not sure. This uncertainty makes me wonder if the transmittal of the virus from ipod to pc when I connect via iTunes.
I doubt the original (infected) file still exists.
The scan in still running. It is my first complete scan, so it is taking a number of hours to run.