Top 10 Viruses for the month of August 2003 according to Sophos
Position       Last month       Virus                Percentage of reports
1                   New                W32/Gibe-F         23.5%
2                      9                   W32/Dumaru-A    18.1%
3                      4                   W32/Mimail-A       15.0%
4                      1                   W32/Sobig-F        5.6%
5                      3                   W32/Nachi-A       5.5%
6                      10                 W32/Sobig-A       4.4%
7                         7                 W32/Bugbear-B   2.9%
8=                      6                   W32/Klez-H           2.7%
8=                      2                   W32/Blaster-A       2.7%
10                   Re-entry          W32/Parite-B          1.3%

Others 18.3%