What virus is responsible for rubella?

Rubella is caused by the rubella virus, which belongs to the Togavirus family. This virus is characterized by a positive-sense single-stranded RNA genome. The Togavirus family includes viruses that often result in conditions such as rubella, which is often known for its mild nature but can have significant consequences if contracted during pregnancy, leading to congenital rubella syndrome.

The characteristics of the Togavirus family place it distinctly apart from the other virus families mentioned in the choices. Orthomyxoviruses are primarily known for causing influenza, while coronaviruses are associated with diseases such as COVID-19 and SARS. Picornaviruses encompass a range of viruses that include poliovirus and rhinoviruses, which are not related to rubella. Understanding the classification and the implications of these viruses provides critical context for the medical ramifications of their infections.