| − | Rubella, or German measles, is a viral infection that is milder than normal measles but as damaging to the unborn child when it occurs early in pregnancy. | + | Rubella, or German measles, is a viral infection that is milder than normal measles but as damaging to the unborn child when it occurs early in pregnancy.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#r</ref> |