问答题 Companies now realize that viruses aren’ t “urban myth” , and can have a serious impact on their operations. They invest in anti-virus software on the desktops, servers and email gateways and even put in place procedures to ensure their anti-virus is up-to-date with the very latest detection routines. It sounds like companies have put in place adequate defenses to protect against viruses. But have they? Anti-virus software must be updated regularly, preferably daily in any large company. Even then, a very new virus can infect your users. With the rapid transmission of files through networks and the Internet, a virus can spread a considerable distance before it can be identified and protected against. Fortunately, only a few viruses ever do this but the likes of Melissa and the Love Bug can inflict serious damage before their progress is stopped. While employees become suddenly aware during the ensuring media excitement, they soon forget about the virus threat as the stories disappear from the news headlines.无