Rubella, also known as German measles, is a mild contagious viral infection caused by the Rubella virus. It typically causes a rash and mild fever, but its most severe impact is on unborn babies if a pregnant woman contracts it, leading to Congenital Rubella Syndrome (CRS).
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Rubella was first distinguished from measles and scarlet fever in the mid-18th century. Its viral nature was confirmed in 1938. A pivotal moment occurred in 1941 when Dr. Norman Gregg recognized the link between maternal Rubella infection and congenital birth defects, leading to the identification of Congenital Rubella Syndrome.
Rubella spreads primarily through airborne droplets when an infected person coughs or sneezes. It can also be transmitted through direct contact with respiratory secretions. A pregnant woman can transmit the virus to her unborn baby through the placenta.
Contagious Period: Varies by disease
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Currently, Rubella case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.
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Trusted information from leading health organizations
Official guidance from the U.S. Centers for Disease Control and Prevention
View CDC Resources →Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-06-03
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