The anti-virus program will only know about these if you update it with the latest virus definitions. Ask your friends and peers to avoid sending MS Word documents as attachments. They can cut and paste the document text into the body of an e-mail. Open attachments only when you are sure they are not infected. Ignore and delete messages that warn of the latest virus threat or those that seem to offer advice for dealing with viruses.
Many worms now disguise themselves with such phrases in the subject line of the message.
Delete jokes, chain mail, junk mail and other messages from unknown sources. Also be sure to empty the 'Trash' folder. Set up the anti-virus program to scan all incoming and outgoing messages. Also set it up to scan files that are downloaded from the Web. Do not download files from unknown websites.