primates
Poliovirus is a human pathogen that doesn't naturally infect any other species. Sientific experiments, however, have successfully infected some chimpanzees.
Human Immunodeficiency Virus (HIV) is a retrovirus so humans are one species. They also infect mammals and other vertebrates such as birds and some forms infect fungi and insects. There is also one that infects yeasts.
Yes, viruses can mutate to infect new species.
Yes, they do.
snow leopards
A pandoravirus is any of a species of very large viruses which infect amoebas.
poliovirus
iVDPV= infective vaccine derived poliovirus cVDPV= circulating vaccine derived poliovirus aVDPV= ambiguous vaccine derived poliovirus They are caused by a mutation regaining virulence in the attenuated poliovirus strains (Sabin 1-3) used for the oral poliomyelitis vaccine (OPV). Not sure of the specific difference between regressed strains though.
Hamburgers
prevention consists of vaccination. There are two polio vaccines available; inactivated (Salk) poliovirus vaccine, and oral poliovirus vaccine.
Yes. Some species of infection causing organisms are very particular and only infect one species, or a small group of related species, but there are a few that are much less picky. One example is the virus that causes rabies. Rabies can infect almost anything that's warm-blooded.