Viruses that travel from computer to computer to spread their infection?
Worm or computer virus
A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers
A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be "infected" with a computer virus