<prompt> True about Rabies virus is -Rabies is diagnosed by immunofluorescenceRabies causes life long immunityRabies has various strains of virusesRabies vaccine is always live attenuated  <response>: The method most commonly used for diagnosis is the administration of rabies virus antigen by immunofluorescence. REF:ANANTHANARAYAN AND PANIKERS TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-533 