<prompt> Rabies virus -Can be isolated from the blood of infected patientsHas multiple antigenic typesCan be transmitted by a dog 4 weeks before the dog becomes noticeably illProduce infection that is almost fatal to humans  <response>: In case of rabies virus death was considerd inevitable and no serious attempt at treatment was made REF:ANANTHANARYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.533 