Coxsackievirus belongs to the family of enteroviruses, which includes other viruses like poliovirus and echovirus. It is a non-enveloped RNA virus and is primarily classified into two groups: Coxsackie A and Coxsackie B. These viruses are known to cause a variety of clinical manifestations ranging from mild symptoms like fever and rash to severe conditions like myocarditis and meningitis.