Besides HAdV-5, a number of other adenoviruses, such as the avirulent canine adenovirus type-2 [73] , chimpanzee adenovirus vector serotype SAd-V24 (also termed AdC68) [74] , and avian adenovirus Celo virus [75] , have also been investigated for use as rabies vaccines, and these recombinant adenoviruses generally elicit robust VNA production and provide adequate protection against rabies.