The survey polled 300 randomly selected companies and found that 92 (30.67%) had had major virus incidents in 2003, up from 80 (26.67%) in the year before. The cost to recover from the incidents also increased, to almost $100,000 last year from $81,000 in 2002. Moreover, nearly 11% of all their machines were infected every month, according to the survey. The numbers indicate that antivirus software isn't proof against infection. Almost all of the companies surveyed said that at least 90% of their desktops have antivirus protection, but still a third of the companies suffered virus disasters.