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Rubella, or German measles, is a mild infectious disease with an incubation period of 14-21 days. Patients can infect other people from one week before the onset of rash until four days afterwards. Maternal rubella infection in the first eight to ten weeks of pregnancy results in foetal damage in up to 90% of infants. Multiple defects are common, and are collectively known as Congenital Rubella Syndrome. A vaccine against rubella exists and is given as part of the triple MMR (measles, mumps and rubella) vaccine.

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