First off, let me say thanks for making such a great product and maintaining this mailing list so the newbies like me can get some answers on things.  My question, obviously, relates to the sanity worm.  I saw on the main page the post from Dec 22 regarding this rule:

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I’m wondering how effective this is and if there are any new strains I need to be aware of or any other advice from the community about dealing with this worm.