I saw a citation for zinc compounds inhibiting the herpesviruses amongst others....the journal was called Heavy Metal Drugs...so I assume there are a variety. Tim Is Metallica a peer reviewer for this journal, ? Muriel Lederman lederman at vt.edu 540.231.5702 (phone) Department of Biology 540.231.9307 (fax) Virginia Tech Blacksburg VA 24061-0406