<prompt> Varicella are classified under -EnterovirusRetrovirusPoxvirusHerpes virus  <response>: Family Herpesviridae is divided into 3 subfamilies based on biological,physical and genetic propeies-Alphaherpesviruses,Betaherpesviruses and Gammaherpesviruses. Alphaherpesviruses include herpes simplex virus and varicella zoster virus. REF:ANATHANARAYAN AND PANIKERS TEXTBOOK OF MICROBIOLOGY 8TH EDITION PAGE NO:467 