<prompt> An elderly male accompanied by his son.The son tells his father has fever, cough, shoness of breath since 2 weeks. The patient is a known case of chronic bronchitis and diabetes. Travel history to Wuhan City, China is present. What is the symmetry of the causative virus?Naked helical symmetrycomplex symmetryEnveloped helical symmetryIcosahedral symmetry  <response>: The patient is suffering from coronavirus disease 2019. The symmetry of the causative virus is enveloped helical symmetry. Coronaviridae is a family of which have the following propeies: Unsegmented genome of positive-sense, single-stranded RNA viruses. They are enveloped viruses. They exhibit helical symmetry. Coronavirus is the causative agent of severe acute respiratory syndrome SARS-CoV. Viruses with Helical Symmetry: Mnemonic: ABC FOR PARAmedics Arenavirus Bunyavirus Coronavirus Filovirus Ohomyxovirus Rhabdovirus Paramyxovirus Reference: Ananthanarayan and Paniker;s Textbook of Microbiology Tenth edition 