Yes Antivirus is available for cloud customers. Here is our documentation on it Enabling the Antivirus Feature. If this is something you are interested in you will want to open a support case via your Private Support Group aka your MyJive Group. If you are not a member of your Support Group your Community Manager should have access and can invite you to join.
Hope this helps.
Thanks for your reply John!
We will raise a case with Private support group.