Rubella and Congenital Rubella. In Conn's Current Therapy 2011. (Book Chapter)
Rubella is normally a mild self-limiting rash-fever illness. Infection during pregnancy, however, may result in fetal death or congenital defects known as congenital rubella syndrome (CRS). Rubella virus is a single-stranded RNA virus (family Togaviridae) of which only one serotype, but several genotypes are known.
2011 Jan. Bope ET, Rakel RE and Kellerman RD, eds. Philadelphia, London: Saunders Elsevier, 2011. p.141-142. ISBN 978-1-4377-0986-5.