Just because you are protected from any virus listed here doesn't mean your safe.
New viruses come out all the time.
McAfee has similar information to Symantec. Sometimes one has information before the other. CIAC is run by the Department of Energy and tracks viruses and security problems across a wide spectrum of computer systems. CERT , run by Carnegie Mellon, carries similar information to what CIAC offers. All will infect the computer with a program that will send itself to addresses in the Outlook address book each time you send email.