The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

email infection host

The virus attaches itself parasitically to email messages as they are sent out by the system. This differs from worms that create new messages to spread themselves. An email infector waits until you compose an email message and then attaches itself to it.