The f-prot antivirus pkg reached it's end of life.
One alternative is clamav. It has a simple gui pkg called clamtk if you wish to avoid a cli.
Steve
Clam Antivirus is command line virus scanner written entirely in C and its database is kept up to date. It also detects polymorphic viruses, scans compressed files and supported by AMaViS. Optionally you can use the clamav-milter interface to connect clamav with sendmail.