4. Classification + sense RNA viruses Porcine teschovirus Teschovirus Aichivirus Kobuvirus Equine rhinitis B virus Erbovirus Human parechovirus Parechovirus Hand foot and mouth virus O Aphtovirus Encephalomyocarditis virus Cardiovirus Human Rhinovirus Rhinovirus Hepatitis A Hepatoviruses Poliovirus, Enterovirus, Coxsackie,Echovirus Enteroviruses Picornaviridae Species Genus Family