<prompt> All of the following rabies vaccines are commercially available except -Killed sheep brain vaccineHuman diploid cell vaccineVero continous cell vaccineRecombinant glycoprotein  <response>: Subunit vaccine -The glycoprotein subunit in the virus surface which is the protective antigen, has been cloned and recombinant vaccines produced. They are still in the experimental stage. REF:ANANTHANARAYAN AND PANIKERS TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:536 