The most pricey bug in history is the Love Bug infection, which was launched in 2000. This virus triggered an estimated $5.5 billion in damage worldwide, making it the most costly infection ever. investigate this site The Love Bug virus was a mass-mailing worm that infected over 45 million computers in just a few days. The infection spread rapidly by emailing itself to everybody in the victim's address book. When a computer was contaminated, the virus would erase important files and spread itself to other computers. The Love Bug infection was eventually dropped in a team of anti-virus scientists who created a vaccine that could protect computers from the infection.