(note sure if this is where it goes) has there ever been a level 4 or 5 virus ?

General Topics
1

I know Symantec has the 1 through 4 or 5 level but as far as I remember no 4’s Ive ever seen? 3s yes but not 4 or higher…has there ever been one?

2

Every av-vendor uses itś own scale. As far as I know, the Klez- and the Yaha- family were the most dangerous/destructive ones up until now, so maybe these would rate a 5 at Symantec ???