The most costly virus in history is the Love Bug virus, which was launched in 2000. This infection triggered an estimated $5.5 billion in damage worldwide, making it the most expensive virus ever. The Love Bug virus was a mass-mailing worm that infected over 45 million computers in simply a few days. visit this web-site The virus spread quickly by emailing itself to everybody in the victim's address book. Once a computer was contaminated, the virus would erase essential files and spread itself to other computer systems. The Love Bug infection was ultimately stopped by a group of antivirus researchers who created a vaccine that might protect computers from the infection.