Anti-virus software developer Sophos has published its latest update to the Top Ten frequently occurring viruses according to percentage. Debuting in the top spot is the Visual Basic Script virus Mawanella (a.k.a. VBS.VBSWG.X) at 37.5%, followed by a quintet of Win32 viruses: I-Worm.Magistr at 24.5%. The remaining 10.1% is occupied by various viruses, worms, and Trojans.”]
Source: https://securelist.com/like-pigs-in-mud-may-2001-virus-list/36023/