Question

Rubella virus belongs to which family?

• A. Rheovirus
• B. Togavirus
• C. Picornavirus
• D. Orthomyxo

Answer 1

The Correct Option is B

Step 1: Place rubella taxonomically - it is the lone species in the genus Rubivirus, and that genus sits within the family Togaviridae. Step 2: The togaviral blueprint is an enveloped, positive-polarity single-stranded RNA genome packaged in an icosahedral capsid, consistent with rubella's structure. Step 3: Clinically this is the same virus that produces postnatal rubella and the dreaded congenital rubella syndrome after early-pregnancy infection. Step 4: The competing families differ fundamentally - Reoviridae are double-stranded RNA, Picornaviridae are naked positive-sense RNA, and Orthomyxoviridae are segmented negative-sense RNA - leaving Togavirus as the only correct family. \[\boxed{\text{Togavirus}}\]