All are characteristics of the polio virus except:

Explanation

Poliovirus is a small, non-enveloped RNA virus belonging to the family Picornaviridae. Its size is approximately 22-30 nanometers in diameter, making it one of the smallest animal viruses. Poliovirus has a single-stranded positive-sense RNA genome, about 7,500 nucleotides long, which encodes a single large polyprotein that is subsequently cleaved into structural and non-structural proteins necessary for viral replication. The virus's small size and simple RNA genome allow it to efficiently infect host cells, replicate rapidly, and cause diseases such as poliomyelitis, which can lead to paralysis in severe cases.