Is DOS under Unix immune?

[Joe Smith]

We are considering adopting '386 Unix in the lab, but I'm curious
about something.  Are the DOS under Unix implementations immune to the
usual PC viruses?  If so, how (in a nutshell)?  If not, is the Unix
filesystem safe at least?  I suppose most readers already know the
answer(s), so just e-mail...

<Joe

--
 Joe Smith
 University of Pennsylvania                    jes at mbio.med.upenn.edu
 Dept. of Biochemistry and Biophysics          (215) 898-8348
 Philadelphia, PA 19104-6059