A monkey is a certain type of apes. Monkeys have tails; (Great) Apes (chimpanzee, gibbon, gorilla, baboon, orang-utan) do NOT have tails. Simian is an adjective, meaning of or pertaining to apes, or ape-like.
Human and simian adenoviruses contain large genomes that undergo evolution, including recombination, as noted for HAdV-D53, -B55 and D-56 recently; it is also recognized in the literature that many of the original serotypes are also recombinants, for example, “18 of the 39 prototypes of group II ...
Origin and diversity of novel avian influenza A H7N9 viruses causing human infection: phylogenetic, structural, and coalescent analyses Di Liu PhD a b * , Weifeng Shi PhD c d * , Yi Shi PhD a e , Dayan Wang PhD f , Haixia X ...