Yes, all our hosting plans include incoming email virus scanning. Our virus database is updated once per day.
However we do not guarantee that our software will catch every possible virus or worm that might be sent to you, you should take your own precautions and run your own virus detection software on your own computer as well. You can obtain such software from http://www.symantec.com, http://www.mcafee.com, or http://www.kapersky.com